My DS weighs about 21 lbs with a slimmish waist (about 17 in), so for a lot of nappies he could either be medium or large. Not sure which size is best to get? I know I'd get more wear/value out of a large, but I want something he can wear now without gaping/leaking.
For example I'm thinking of trying a Weenotions northern lights - medium is 15-25 lbs and large is 20-35 lbs. Anyone got an LO weighing similar, which size do you use?