Button size frame

It’s hard to imagine the size of the numbers drawn when buying buttons, pigeons and eyebrows online.

Isn’t it difficult to figure out the size because it’s not round even if you look at the ruler?

It is a frame to eliminate such inconvenience.
I think that it is possible to use it, such as the button decision which balances by putting it off to clothes and deciding.

※ As it may seem that some error may come out by the performance of the printer, the way of setting the paper, the deterioration of the part of the paper feeding, etc., please use it as a guide only.