The buttonhole will depend on button size and the handle length will depend on if this is hanging off a purse or bookbag or… so, a lot of variables will factor into the final product of this handy creation. The bonus will be that, unlike the rubber cases you can buy to holster these bad boys in, the yarn will not snap apart and drop the sanitizer. You can decorate it as you want and they make great gifts, especially for teachers and anyone in the medical field. Just remember with all the different sizes that hand sanitizer comes in and your tension as a crocheter that the pattern may call for adjusting. But since these work up in minutes there is no frustration. :)