The one on the left is .625 inches on a side or 5/8 of an inch. The one on the right is .5 or 1/2 inches on a side. I challenged myself to use scraps and to make them two colored hexies besides. That is a penny on the right side and a quarter over the one on the left side. My Mom had called this morning and said I was nuts to do all this hand work. Why not use my machine more than I came up with this idea. She did the ultimate sin today she threw her scraps away. She was tired of using them. I about had a heart attack over that. But I am sure they are in gushy garbage so I don't think I will go retrieve them. This is fun and I like seeing what I can come up with out of a pile of scraps. Call me Nuts but I am having fun and using scraps that aren't going to the landfill. Mother did you hear that? Chris Oh yes and I am using thread up so I have less small amounts on spools in my drawers.