Original version was in inches. I tried converting by scaling and printing, but it didn't work well so I brought it into Fusion 360 and converted it to mm and re-exported. I also made a shorter version that will fit the mini Coke, Sprite, etc. cans as pictured. The smaller one fits just ever so slightly loose, but it didn't seem to cause any issues for the kids using them. Just a simple remix from someone else's wonderful previous design. A few drops of superglue hold the cross piece in place nicely.