I love these Hill Tribe rectangle tube beads, they look good wherever you want to use them. I bought them hoping .05mm leather would fit through the hole, but it doesn't. It will go in a little, but I think the silver must be thicker within the tube, becasue I can't get it to pass all the way through....I tried both ends. So, if you are thinking of using these with leather, they wont work, but they sit nicely on beading wire. They are still a great bead. I'm just writing this review, because sometimes you need to know what the hole size is....hope it helps.