I get the ones that go from like 6-18 months as they last lots longer, I think the make of the ones I have is Lily&Dan x
6-12 Sainsbury's brand "Tu"
We have a couple 6-18 month ones from White Company and they’re really roomy and she seems comfy and cosy in them :)
I have a 6-12 from Tesco and seemed to be long x
6-18 months m&s or Asda
We have the Mori ones that are newborn to size 2. They are big but it’s just like a big blanket. They are not cheap but such good quality make you can get on sale. This is the second time using them too as they were my daughters
I bought one from Primark, it's 6-18 months and fits well, my baby is really long so he'll probably outgrown it soon but works for us and it's really nice in touch! I have one 2.5 tog and one 1 tog for summer.