A similar question came up recently. I use 43mm $20s and $5s along with 39mm $1s and .25s. Some players don’t love it because if you want to bet $12 and your fingers grab the two $5s first, they can’t smoothly grab the two $1s in a neat little stack, because of the size difference. But if you grab your small chips first, it works pretty smoothly.
Anyway, I like it.
And this may vary with hand size, but personally I like shuffling 43mm chips best out of all the sizes.