Clothes for teenage boys

[wasnotwasweregood]

DS is just 14. Longshanks. Built like a dainty whippet and I'm really struggling to find clothes that fit him. I've relied on H&M all this time and now he's outgrown the kids/teenage range but is way too slim for adult ranges.
Can any of you recommend a brand of not too expensive clothes that cater to tall and super slim young men? I imagine this must be a really common problem.

DSS is 15 and he loves the clothing in JD sports. Supply and demand xxs or Xs fits.him and he is as skinny as anything.

Also ASOS is good too.

Hollister are not too bad for tall and skinny. They often have sales and discounts - sign up for mailing list and buy when on offer!

Abercrombie is good for my tall and skinny boys.

Another vote for Hollister. My DS 14 loves them. I've had success with the skinny jeans in the men's section of H&M though op?

Thank you all, I will check out your recommendations.

Ta!