The mitten on the left is the large adult size from The World’s Simplest Mittens. The mitten on the right is the toddler size. Gauge matters, people.
I’m going to donate the bigger pair so a child can have nice warm hands, and I think I’ll turn the little ones into tree ornaments somehow. If they were made of something more easily washable I might have sent them down to my 3-month-old niece because they would probably fit her fine!
Despite the sizing issues I am really pleased with them. I probably could have faffed with the yarn a bit more to get a thinner red stripe on the big mitten thumb, but I’m pleased that both pairs match pretty much perfectly. I count this as a job (fairly) well done.