Will this sound better?

if i add a sticky note? Unfortuanlty my invitations are already made and printed so no room. ?

I want to add a little note on my babys invitations saying an example: If clothes are giving plse 18 MO or bigger.

Is this rude? My baby will be 1 yr BUT she is a chubby baby so she has fat leggs. If someone gave an invitation saying this I would honestly take in a good way because it would help me even more that I'm getting the baby a gift that will fit them and not wonder if it didn't. I dont want to write it down or make it seem rude in any type of way you know.

Any ideas how it will sound better?