PoppyField Morris and BitOutofPractice - thanks for chasing Chandler away from this thread. She was really getting on my fabulous 'pneumatic-unless-they-are-strapped-into-two-sports-bras' tits.
Sorry to break into your smug little clicque, but I went out training. I would support all women running, not just those who meet a certain size requirement or who fit into your little idea of who is nicest, and the notion that female runners who aren't part of your clicque aren't entitled to an opinion is laughable.
But I don't think you can expect brand manufacturers to perform a public service duty to produce all sizes when they make a profit out of a certain market. I don't think the problem is that sport clothing isn't available in all sizes, just a problem that anyone ordering clothes online can experience - they might not fit. That can happen to you whatever size you are. I am under the impression that Sweaty Betty size XL is a 14. XS is an 8, S is a 10, M is a 12 and L is a 14. I've found it quite true to size. But exactly the same thing could happen if you ordered a pair of jeans online.
tbh OP no-one really cares what you look like when you are training, its what you do that's more important. But if you want to be fast(er), then power to weight ratio and not getting injured due to wear and tear on joints has an effect eventually.
No-one is sneering, but get a grip. I see athletes far more talented than me, even Olympic standard, and they are far more humble than some posters on this thread. But they do genuinely run fast of course.