Help what size mountain bike for a small 13/14 year old!

[MardyMavis]

I'm actually confused with online measurements looking at Carrera bikes I think an adults one will be way to big he is in 11/12 clothes small for his age,can anyone help? Thanks

We bought our ds the 18 inch last year when he was a similar size but in Halfords they will take the bottom off the saddle pole thing so that it will sit as low as possible. Bike has been fab!

Lovely thank you was that I'm the junior range?

Pretty sure it was men’s. They said they 16 would have been perfect then but if he grew it would be too small very quick. I was worried that the 18 would be too big but with the seat right down it has been perfect. Great bikes!

Great thank you

We have just bought a 16in Carrera for our 12 year old boy. He is very small for his age and we took him to Halfords weeks ago and got him to sit on some bikes so that we knew!