So DSD is almost 6 and somewhat in between sizes. She's got a lot of outdoor gear in 5-6 which is getting too small, her coat especially can't be done up if she's also wearing a jumper which is pretty unhelpful when it's cold and raining. We bought her a coat aged 7-8 and its absolutely massive! Is there anywhere that sells 6-7? I've looked in Go Outdoors, Mountain Warehouse, Regatta, Trespass and even Sports Direct. They all jump straight from 5-6 to 7-8! She loves being outside and walking but it's pretty rubbish for her if her waterproofs don't fit.