Jogging bottoms for slim children?

[IlonaRN]

Where can I find jogging bottoms that are long in the leg but not wide around the waist? He will need a size 7-8 next.
My boy is ~40th centile for weight, but 67th for height, and is rapidly growing out of his current size 6-7 jogging bottoms, but they are still too big around the waist (so much so that they fall down if not tied, and he is only just learning to tie bows!)
Are there any that are longer in the leg compared to the waist circumference?

I have the same problem with my skinny, long legged DS. I find Next slim fit joggers are good for him.

When mine were smaller we had similar issues. I bought some toggles online to attach to the drawstrings so they could tighten/loosen for the loo and not have to worry about tying bows 😀

Next are huge on my DS8’s waist. H&M are the only ones that fit (90th for height, 20th for weight). They also stretch to fit my more proportional DS10!

Same problem, but last time I bought H&M they were far too wide. Next ones are the nearest to fitting that I've found.
M&S used to be OK but vary massively.
Can't buy any supermarket joggers - they are all incredibly wide/ the drawstrings are just decorative.

I also buy next slim fit and just remind him
often to pull them up.