Fleece soaker sizing help

I have just won a pumpkin pants fleece soaker but have never had one before so have no idea what size I need - atm we are using despicables overnight but I have 2 large WNNN's ordered so will be using it over these

Tyler is approx 23-24 lbs but quite slim - definitely not a chunky baby, nappy wise he wears large everything but done up on their tightest if that makes sense - size 2 little lambs and bamboozles I can cross the applix over and large blueberries and ittis he has them done up on the smallest poppers, he is still in medium fuzzi bunz again done up on their tightest poppers.

Would a large be big enough for him do you think? That would be my guess but I have heard that fleece soakers come up smaller than other wraps?

Large should be OK - I haven't tried Pumpkin Pants, we use large Monster Fluff Studio, and they fit well over large WNNN. Jasmine's 28lb and wears large nappies on the second poppers in, if that helps.

I wouldn't go for an XL as you'll probably find that the waist band will be too big for your LO. I won a medium pumpkin pants soaker and it only just fit Oz's daytime nappies and he's a similar weight to your LO so large should be a good fit for night nappies.