Bests & Worsts Reviews from Amazon

I am angry and frustrated. I ordered several Amazon gift cards - in different denominations - as Christmas gifts. They are all sitting in front of me. And I have no idea which is for $50, which is for $75 and which is for $100. I’m sure there is a way to figure it out. But really, couldn’t you just put the amount somewhere on the gift card so that it wouldn’t be necessary to go to that trouble. Very annoying!