diff --git a/packages/SystemUI/res/values/dimens.xml b/packages/SystemUI/res/values/dimens.xml
index 738981db68232..89cc56d828363 100644
--- a/packages/SystemUI/res/values/dimens.xml
+++ b/packages/SystemUI/res/values/dimens.xml
@@ -1507,6 +1507,7 @@
     <dimen name="dream_overlay_complication_preview_icon_padding">28dp</dimen>
     <dimen name="dream_overlay_complication_shadow_padding">2dp</dimen>
     <dimen name="dream_overlay_complication_smartspace_padding">24dp</dimen>
+    <dimen name="dream_overlay_complication_smartspace_max_width">408dp</dimen>
 
     <!-- The position of the end guide, which dream overlay complications can align their start with
          if their end is aligned with the parent end. Represented as the percentage over from the
diff --git a/packages/SystemUI/src/com/android/systemui/dreams/complication/ComplicationLayoutEngine.java b/packages/SystemUI/src/com/android/systemui/dreams/complication/ComplicationLayoutEngine.java
index ff7d78667fe8b..46ce7a90f5a31 100644
--- a/packages/SystemUI/src/com/android/systemui/dreams/complication/ComplicationLayoutEngine.java
+++ b/packages/SystemUI/src/com/android/systemui/dreams/complication/ComplicationLayoutEngine.java
@@ -211,6 +211,19 @@ public class ComplicationLayoutEngine implements Complication.VisibilityControll
                 }
             });
 
+            if (mLayoutParams.constraintSpecified()) {
+                switch (direction) {
+                    case ComplicationLayoutParams.DIRECTION_START:
+                    case ComplicationLayoutParams.DIRECTION_END:
+                        params.matchConstraintMaxWidth = mLayoutParams.getConstraint();
+                        break;
+                    case ComplicationLayoutParams.DIRECTION_UP:
+                    case ComplicationLayoutParams.DIRECTION_DOWN:
+                        params.matchConstraintMaxHeight = mLayoutParams.getConstraint();
+                        break;
+                }
+            }
+
             mView.setLayoutParams(params);
         }
 
diff --git a/packages/SystemUI/src/com/android/systemui/dreams/complication/ComplicationLayoutParams.java b/packages/SystemUI/src/com/android/systemui/dreams/complication/ComplicationLayoutParams.java
index c600ebc8a77d6..1755cb92da701 100644
--- a/packages/SystemUI/src/com/android/systemui/dreams/complication/ComplicationLayoutParams.java
+++ b/packages/SystemUI/src/com/android/systemui/dreams/complication/ComplicationLayoutParams.java
@@ -52,6 +52,7 @@ public class ComplicationLayoutParams extends ViewGroup.LayoutParams {
     private static final int LAST_POSITION = POSITION_END;
 
     private static final int MARGIN_UNSPECIFIED = 0xFFFFFFFF;
+    private static final int CONSTRAINT_UNSPECIFIED = 0xFFFFFFFF;
 
     @Retention(RetentionPolicy.SOURCE)
     @IntDef(flag = true, prefix = { "DIRECTION_" }, value = {
@@ -81,6 +82,8 @@ public class ComplicationLayoutParams extends ViewGroup.LayoutParams {
 
     private final int mMargin;
 
+    private final int mConstraint;
+
     private final boolean mSnapToGuide;
 
     // Do not allow specifying opposite positions
@@ -110,7 +113,8 @@ public class ComplicationLayoutParams extends ViewGroup.LayoutParams {
      */
     public ComplicationLayoutParams(int width, int height, @Position int position,
             @Direction int direction, int weight) {
-        this(width, height, position, direction, weight, MARGIN_UNSPECIFIED, false);
+        this(width, height, position, direction, weight, MARGIN_UNSPECIFIED, CONSTRAINT_UNSPECIFIED,
+                false);
     }
 
     /**
@@ -127,7 +131,27 @@ public class ComplicationLayoutParams extends ViewGroup.LayoutParams {
      */
     public ComplicationLayoutParams(int width, int height, @Position int position,
             @Direction int direction, int weight, int margin) {
-        this(width, height, position, direction, weight, margin, false);
+        this(width, height, position, direction, weight, margin, CONSTRAINT_UNSPECIFIED, false);
+    }
+
+    /**
+     * Constructs a {@link ComplicationLayoutParams}.
+     * @param width The width {@link android.view.View.MeasureSpec} for the view.
+     * @param height The height {@link android.view.View.MeasureSpec} for the view.
+     * @param position The place within the parent container where the view should be positioned.
+     * @param direction The direction the view should be laid out from either the parent container
+     *                  or preceding view.
+     * @param weight The weight that should be considered for this view when compared to other
+     *               views. This has an impact on the placement of the view but not the rendering of
+     *               the view.
+     * @param margin The margin to apply between complications.
+     * @param constraint The max width or height the complication is allowed to spread, depending on
+     *                   its direction. For horizontal directions, this would be applied on width,
+     *                   and for vertical directions, height.
+     */
+    public ComplicationLayoutParams(int width, int height, @Position int position,
+            @Direction int direction, int weight, int margin, int constraint) {
+        this(width, height, position, direction, weight, margin, constraint, false);
     }
 
     /**
@@ -148,7 +172,8 @@ public class ComplicationLayoutParams extends ViewGroup.LayoutParams {
      */
     public ComplicationLayoutParams(int width, int height, @Position int position,
             @Direction int direction, int weight, boolean snapToGuide) {
-        this(width, height, position, direction, weight, MARGIN_UNSPECIFIED, snapToGuide);
+        this(width, height, position, direction, weight, MARGIN_UNSPECIFIED, CONSTRAINT_UNSPECIFIED,
+                snapToGuide);
     }
 
     /**
@@ -162,6 +187,9 @@ public class ComplicationLayoutParams extends ViewGroup.LayoutParams {
      *               views. This has an impact on the placement of the view but not the rendering of
      *               the view.
      * @param margin The margin to apply between complications.
+     * @param constraint The max width or height the complication is allowed to spread, depending on
+     *                   its direction. For horizontal directions, this would be applied on width,
+     *                   and for vertical directions, height.
      * @param snapToGuide When set to {@code true}, the dimension perpendicular to the direction
      *                    will be automatically set to align with a predetermined guide for that
      *                    side. For example, if the complication is aligned to the top end and
@@ -169,7 +197,7 @@ public class ComplicationLayoutParams extends ViewGroup.LayoutParams {
      *                    from the end of the parent to the guide.
      */
     public ComplicationLayoutParams(int width, int height, @Position int position,
-            @Direction int direction, int weight, int margin, boolean snapToGuide) {
+            @Direction int direction, int weight, int margin, int constraint, boolean snapToGuide) {
         super(width, height);
 
         if (!validatePosition(position)) {
@@ -187,6 +215,8 @@ public class ComplicationLayoutParams extends ViewGroup.LayoutParams {
 
         mMargin = margin;
 
+        mConstraint = constraint;
+
         mSnapToGuide = snapToGuide;
     }
 
@@ -199,6 +229,7 @@ public class ComplicationLayoutParams extends ViewGroup.LayoutParams {
         mDirection = source.mDirection;
         mWeight = source.mWeight;
         mMargin = source.mMargin;
+        mConstraint = source.mConstraint;
         mSnapToGuide = source.mSnapToGuide;
     }
 
@@ -268,6 +299,21 @@ public class ComplicationLayoutParams extends ViewGroup.LayoutParams {
         return mMargin == MARGIN_UNSPECIFIED ? defaultMargin : mMargin;
     }
 
+    /**
+     * Returns whether the horizontal or vertical constraint has been specified.
+     */
+    public boolean constraintSpecified() {
+        return mConstraint != CONSTRAINT_UNSPECIFIED;
+    }
+
+    /**
+     * Returns the horizontal or vertical constraint of the complication, depending its direction.
+     * For horizontal directions, this is the max width, and for vertical directions, max height.
+     */
+    public int getConstraint() {
+        return mConstraint;
+    }
+
     /**
      * Returns whether the complication's dimension perpendicular to direction should be
      * automatically set.
diff --git a/packages/SystemUI/src/com/android/systemui/dreams/complication/dagger/RegisteredComplicationsModule.java b/packages/SystemUI/src/com/android/systemui/dreams/complication/dagger/RegisteredComplicationsModule.java
index 59392191e5bf3..9b954f5f0c4ac 100644
--- a/packages/SystemUI/src/com/android/systemui/dreams/complication/dagger/RegisteredComplicationsModule.java
+++ b/packages/SystemUI/src/com/android/systemui/dreams/complication/dagger/RegisteredComplicationsModule.java
@@ -103,12 +103,14 @@ public interface RegisteredComplicationsModule {
     @Provides
     @Named(DREAM_SMARTSPACE_LAYOUT_PARAMS)
     static ComplicationLayoutParams provideSmartspaceLayoutParams(@Main Resources res) {
-        return new ComplicationLayoutParams(0,
+        return new ComplicationLayoutParams(
+                ViewGroup.LayoutParams.WRAP_CONTENT,
                 ViewGroup.LayoutParams.WRAP_CONTENT,
                 ComplicationLayoutParams.POSITION_BOTTOM
                         | ComplicationLayoutParams.POSITION_START,
                 ComplicationLayoutParams.DIRECTION_END,
                 DREAM_SMARTSPACE_COMPLICATION_WEIGHT,
-                res.getDimensionPixelSize(R.dimen.dream_overlay_complication_smartspace_padding));
+                res.getDimensionPixelSize(R.dimen.dream_overlay_complication_smartspace_padding),
+                res.getDimensionPixelSize(R.dimen.dream_overlay_complication_smartspace_max_width));
     }
 }
diff --git a/packages/SystemUI/tests/src/com/android/systemui/dreams/complication/ComplicationLayoutEngineTest.java b/packages/SystemUI/tests/src/com/android/systemui/dreams/complication/ComplicationLayoutEngineTest.java
index 7a2409876c52a..06a944e7a6d3f 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/dreams/complication/ComplicationLayoutEngineTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/dreams/complication/ComplicationLayoutEngineTest.java
@@ -440,6 +440,133 @@ public class ComplicationLayoutEngineTest extends SysuiTestCase {
         });
     }
 
+    /**
+     * Ensures layout sets correct max width constraint.
+     */
+    @Test
+    public void testWidthConstraint() {
+        final int maxWidth = 20;
+        final ComplicationLayoutEngine engine =
+                new ComplicationLayoutEngine(mLayout, 0, mTouchSession, 0, 0);
+
+        final ViewInfo viewStartDirection = new ViewInfo(
+                new ComplicationLayoutParams(
+                        100,
+                        100,
+                        ComplicationLayoutParams.POSITION_TOP
+                                | ComplicationLayoutParams.POSITION_END,
+                        ComplicationLayoutParams.DIRECTION_START,
+                        0,
+                        5,
+                        maxWidth),
+                Complication.CATEGORY_STANDARD,
+                mLayout);
+        final ViewInfo viewEndDirection = new ViewInfo(
+                new ComplicationLayoutParams(
+                        100,
+                        100,
+                        ComplicationLayoutParams.POSITION_TOP
+                                | ComplicationLayoutParams.POSITION_START,
+                        ComplicationLayoutParams.DIRECTION_END,
+                        0,
+                        5,
+                        maxWidth),
+                Complication.CATEGORY_STANDARD,
+                mLayout);
+
+        addComplication(engine, viewStartDirection);
+        addComplication(engine, viewEndDirection);
+
+        // Verify both horizontal direction views have max width set correctly, and max height is
+        // not set.
+        verifyChange(viewStartDirection, false, lp -> {
+            assertThat(lp.matchConstraintMaxWidth).isEqualTo(maxWidth);
+            assertThat(lp.matchConstraintMaxHeight).isEqualTo(0);
+        });
+        verifyChange(viewEndDirection, false, lp -> {
+            assertThat(lp.matchConstraintMaxWidth).isEqualTo(maxWidth);
+            assertThat(lp.matchConstraintMaxHeight).isEqualTo(0);
+        });
+    }
+
+    /**
+     * Ensures layout sets correct max height constraint.
+     */
+    @Test
+    public void testHeightConstraint() {
+        final int maxHeight = 20;
+        final ComplicationLayoutEngine engine =
+                new ComplicationLayoutEngine(mLayout, 0, mTouchSession, 0, 0);
+
+        final ViewInfo viewUpDirection = new ViewInfo(
+                new ComplicationLayoutParams(
+                        100,
+                        100,
+                        ComplicationLayoutParams.POSITION_BOTTOM
+                                | ComplicationLayoutParams.POSITION_END,
+                        ComplicationLayoutParams.DIRECTION_UP,
+                        0,
+                        5,
+                        maxHeight),
+                Complication.CATEGORY_STANDARD,
+                mLayout);
+        final ViewInfo viewDownDirection = new ViewInfo(
+                new ComplicationLayoutParams(
+                        100,
+                        100,
+                        ComplicationLayoutParams.POSITION_TOP
+                                | ComplicationLayoutParams.POSITION_END,
+                        ComplicationLayoutParams.DIRECTION_DOWN,
+                        0,
+                        5,
+                        maxHeight),
+                Complication.CATEGORY_STANDARD,
+                mLayout);
+
+        addComplication(engine, viewUpDirection);
+        addComplication(engine, viewDownDirection);
+
+        // Verify both vertical direction views have max height set correctly, and max width is
+        // not set.
+        verifyChange(viewUpDirection, false, lp -> {
+            assertThat(lp.matchConstraintMaxHeight).isEqualTo(maxHeight);
+            assertThat(lp.matchConstraintMaxWidth).isEqualTo(0);
+        });
+        verifyChange(viewDownDirection, false, lp -> {
+            assertThat(lp.matchConstraintMaxHeight).isEqualTo(maxHeight);
+            assertThat(lp.matchConstraintMaxWidth).isEqualTo(0);
+        });
+    }
+
+    /**
+     * Ensures layout does not set any constraint if not specified.
+     */
+    @Test
+    public void testConstraintNotSetWhenNotSpecified() {
+        final ComplicationLayoutEngine engine =
+                new ComplicationLayoutEngine(mLayout, 0, mTouchSession, 0, 0);
+
+        final ViewInfo view = new ViewInfo(
+                new ComplicationLayoutParams(
+                        100,
+                        100,
+                        ComplicationLayoutParams.POSITION_TOP
+                                | ComplicationLayoutParams.POSITION_END,
+                        ComplicationLayoutParams.DIRECTION_DOWN,
+                        0,
+                        5),
+                Complication.CATEGORY_STANDARD,
+                mLayout);
+
+        addComplication(engine, view);
+
+        // Verify neither max height nor max width set.
+        verifyChange(view, false, lp -> {
+            assertThat(lp.matchConstraintMaxHeight).isEqualTo(0);
+            assertThat(lp.matchConstraintMaxWidth).isEqualTo(0);
+        });
+    }
+
     /**
      * Ensures layout in a particular position updates.
      */
diff --git a/packages/SystemUI/tests/src/com/android/systemui/dreams/complication/ComplicationLayoutParamsTest.java b/packages/SystemUI/tests/src/com/android/systemui/dreams/complication/ComplicationLayoutParamsTest.java
index 19a88c39055c8..fdb4cc4480dad 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/dreams/complication/ComplicationLayoutParamsTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/dreams/complication/ComplicationLayoutParamsTest.java
@@ -136,13 +136,15 @@ public class ComplicationLayoutParamsTest extends SysuiTestCase {
                 ComplicationLayoutParams.POSITION_TOP,
                 ComplicationLayoutParams.DIRECTION_DOWN,
                 3,
-                10);
+                10,
+                20);
         final ComplicationLayoutParams copy = new ComplicationLayoutParams(params);
 
         assertThat(copy.getDirection() == params.getDirection()).isTrue();
         assertThat(copy.getPosition() == params.getPosition()).isTrue();
         assertThat(copy.getWeight() == params.getWeight()).isTrue();
         assertThat(copy.getMargin(0) == params.getMargin(1)).isTrue();
+        assertThat(copy.getConstraint() == params.getConstraint()).isTrue();
         assertThat(copy.height == params.height).isTrue();
         assertThat(copy.width == params.width).isTrue();
     }
@@ -168,4 +170,31 @@ public class ComplicationLayoutParamsTest extends SysuiTestCase {
         assertThat(copy.height == params.height).isTrue();
         assertThat(copy.width == params.width).isTrue();
     }
+
+    /**
+     * Ensures that constraint is set correctly.
+     */
+    @Test
+    public void testConstraint() {
+        final ComplicationLayoutParams paramsWithoutConstraint = new ComplicationLayoutParams(
+                100,
+                100,
+                ComplicationLayoutParams.POSITION_TOP,
+                ComplicationLayoutParams.DIRECTION_DOWN,
+                3,
+                10);
+        assertThat(paramsWithoutConstraint.constraintSpecified()).isFalse();
+
+        final int constraint = 10;
+        final ComplicationLayoutParams paramsWithConstraint = new ComplicationLayoutParams(
+                100,
+                100,
+                ComplicationLayoutParams.POSITION_TOP,
+                ComplicationLayoutParams.DIRECTION_DOWN,
+                3,
+                10,
+                constraint);
+        assertThat(paramsWithConstraint.constraintSpecified()).isTrue();
+        assertThat(paramsWithConstraint.getConstraint()).isEqualTo(constraint);
+    }
 }