Joggers for slim boy

[Porge70]

Hi - does anyone know where I get can joggers for my skinny 10 year old? As these don't have adjustable waistband, those that fit in the length are too big around the waist so just fall down. He's fed up with wearing joggers (he needs them for school and gymnastics) that are way too short.

Thank you to anyone who responds

M&S do joggers with a drawstring waist. They can't be the only shop that does. Have you looked in sports shops, for proper sportswear ones? They tend to have drawstring waists too.

I think Next do slim fit, check whether for joggers as well as trousers? I'm fairly sure Lands end do slim fit stuff for boys too. But anything with a drawstring waist would help! Zara is fairly slim fitting, try here too?