These charming vintage button covers range in size.
Two of them (the ones that have two pigs) measure 1 and one-quarter inches tall x 1 and one-half inches wide.
Four of them (the ones that are single pigs) each measure 1 inch tall x 1 and one-quarter inches wide.
My vintage items sometimes have some wear due to age. This may or may not come out with the right cleaning solution. I'm hesitant to try for fear of damaging them. In many cases, I think the wear adds to their charm.