Quick one: sizing of WNOS

Hi,

Going to be ordering my first weenotions soon, was thinking of getting a one size but wondered how they were sizing wise. What do they compare to in relation to other btp nappies?

Thanks

Ive found them decent on sizing. They fit T from early although they were a bit wide between the legs and I have only recently had to unsnap them fully in the rise at 15 months and he seems to have LOADS of growing room as they all still do up right to the middle on the poppers one and the aplix ones almost touch in the centre.