While we are musicians and have used various picks, we have not used/seen every pick available. Also manufacturers release new pick designs all the time. We have devised a method using an american coin(a quarter) to allow you to judge the relative size of our picks. We will soon be updating this with a ruler to help our international customers.
If you go back to our store, find the pick that closely resembles yours, (which would be in product categories), then click on the button (see 2 more pictures) you can then compare the pictures of picks with quarters lying on top of them and then compare your pick with the same coin. You should be able to judge pick size from that.