diff --git a/Sources/MDCItemBar.m b/Sources/MDCItemBar.m
index ee59a7f..a4476ce 100644
--- a/Sources/MDCItemBar.m
+++ b/Sources/MDCItemBar.m
@@ -36,10 +36,10 @@
 static const CGFloat kPlaceholderCellWidth = 10.0f;
 
 /// Horizontal insets in regular size class layouts.
-static const CGFloat kRegularInset = 56.0f;
+static const CGFloat kRegularInset = 0;
 
 /// Horizontal insets in compact size class layouts.
-static const CGFloat kCompactInset = 8.0f;
+static const CGFloat kCompactInset = 0;
 
 /// KVO context pointer identifying changes in MDCItemBarItem properties.
 static void *kItemPropertyContext = &kItemPropertyContext;
diff --git a/Sources/MDCItemBarCell.m b/Sources/MDCItemBarCell.m
index 0d3c008..a84e53f 100644
--- a/Sources/MDCItemBarCell.m
+++ b/Sources/MDCItemBarCell.m
@@ -93,7 +93,7 @@ - (instancetype)initWithFrame:(CGRect)frame {
 
 + (UIEdgeInsets)edgeInsetsForHorizontalSizeClass:(UIUserInterfaceSizeClass)sizeClass {
   // Padding from spec: https://material.io/guidelines/components/tabs.html
-  CGFloat outerPadding = (sizeClass == UIUserInterfaceSizeClassRegular) ? 24.0f : 12.0f;
+  CGFloat outerPadding = 10;
   return UIEdgeInsetsMake(0.0, outerPadding, 0.0, outerPadding);
 }
 
diff --git a/Sources/MDCTabBar.m b/Sources/MDCTabBar.m
index da8d02c..1680652 100644
--- a/Sources/MDCTabBar.m
+++ b/Sources/MDCTabBar.m
@@ -52,7 +52,7 @@
 static const CGFloat kImageOnlyBarHeight = 48;
 
 /// Height for image-only tab bars, in points.
-static const CGFloat kTitleOnlyBarHeight = 48;
+static const CGFloat kTitleOnlyBarHeight = 44;
 
 /// Height for image-and-title tab bars, in points.
 static const CGFloat kTitledImageBarHeight = 72;