I found this company called Fabletics.com that does yoga wear online, I think Kate Hudson (Movie star) owns it, or founded it. What I love about the gear is that there is a great variety and it seems very well priced. The patterns on the leggings are brilliant and are enough to motivate anyone into fitness.
AND the best bit, they cater for all sizes. cheap and cheerful.
https://www.fabletics.co.uk/
https://www.fabletics.com/