diff --git a/Source/IGListCollectionViewLayout.mm b/Source/IGListCollectionViewLayout.mm
index ebb50643..cf4f3523 100644
--- a/Source/IGListCollectionViewLayout.mm
+++ b/Source/IGListCollectionViewLayout.mm
@@ -492,11 +492,14 @@ static void adjustZIndexForAttributes(UICollectionViewLayoutAttributes *attribut
             const CGSize size = [delegate collectionView:collectionView layout:self sizeForItemAtIndexPath:indexPath];
 
             IGAssert(CGSizeGetLengthInDirection(size, fixedDirection) <= paddedLengthInFixedDirection
-                    || fabs(CGSizeGetLengthInDirection(size, fixedDirection) - paddedLengthInFixedDirection) < FLT_EPSILON,
-                    @"%@ of item %zi in section %zi must be less than container %.0f accounting for section insets %@",
-                    self.scrollDirection == UICollectionViewScrollDirectionVertical ? @"Width" : @"Height",
-                    item, section, CGRectGetLengthInDirection(contentInsetAdjustedCollectionViewBounds, fixedDirection),
-                    NSStringFromUIEdgeInsets(insets));
+                     || fabs(CGSizeGetLengthInDirection(size, fixedDirection) - paddedLengthInFixedDirection) < FLT_EPSILON,
+                     @"%@ of item %zi in section %zi (%.0f pt) must be less than or equal to container (%.0f pt) accounting for section insets %@",
+                     self.scrollDirection == UICollectionViewScrollDirectionVertical ? @"Width" : @"Height",
+                     item,
+                     section,
+                     CGSizeGetLengthInDirection(size, fixedDirection),
+                     CGRectGetLengthInDirection(contentInsetAdjustedCollectionViewBounds, fixedDirection),
+                     NSStringFromUIEdgeInsets(insets));
 
             CGFloat itemLengthInFixedDirection = MIN(CGSizeGetLengthInDirection(size, fixedDirection), paddedLengthInFixedDirection);