What age do they move from small to medium nappies?

[maz]

Yep what BG said and take into mind that IB's are generally a smaller sized nappy in comparison to a BBH an fitteds

[~Kim~]

My little guy is still swimming in an IB snap-in in Med...and he's nearly 16months lol. But he is tiny....you're def right about the string thing.

[~Hestia~]

My DS started off in BBH size medium when he was about 7 weeks old. He does have chunky little thighs though!

[Arimeh]

DD1 went into most mediums at about 7 months.

DD2 went into mediums at 4 months. Completely different build.

[Artechim]

DD went into mediums at 3 months, large at 9 months

[*TripleJ*]

WOW Artechim hes a big boy

DS started in mediums and he was about 6/7 months not sure if they could have fit earlier but he is still on the smallest setting in some of his mediums so mediums last a long time around here since then and hes 1 now

[halltribe]

My 2yo is still in meds - he swims in most lrges. The ittis small are only just starting to fit my 13 week old girl. Different brands have different sizing and all babies are different too.