This depression pattern has two sizes of cream and sugars. Strangely enough the 4" sugar has a smaller diameter at the top than the 3" sugar. It measures 3 5/8" vs. 3 3/4". If you try to put a 3" lid on a 4" sugar it won't quite fit. That's something to remember if you are looking to buy a 4" lid since it books for 6 times the 3" lid.
Remember, if you buy a 4" sugar and the lid doesn't quite fit, that's because it's a 3" lid.