My friends DD is 18 months, lovely little thing but is quite skinny and has no bum.
12-18 month clothes are the right length, but trousers just fall off her.
She'd probably be alright with about 6 nappies on 
She is living in tights and dresses, (and gap baby skinny jeans 6-12mth) and leggings.
Can anyone suggest what might be a good fit for her?