My friends' twin daughters had daughters of their own very close together. The two little cousins like to have everythting the same so I made them matching bags.
After I put the first one together, I decided the handles were too wide for 6yo hands, so I unpicked the absolute bare minimum to get the handles out, then folded them over, sewed down the length and stuck them back in. I made them a few inches sorter while I was at it. The handles are much stiffer than they would have been but that's probably a good thing.