That shouldn't be legal. They are discriminating. Talk to your local labor board or a lawyer. There is NO reason they couldn't order a uniform that would fit you.
Talk to the labor board. Human rights.
Speak to an ATTORNEY ASAP ..... They cannot do that ....
hmmm Gym costs a lot to join. I would suggest you go in and see if you could get a free week trial, to check their machines.
Then do the same at the next Gym.
Drink water. Lots of water. Water clears the oils before they form into fat tissue. Watch the color of your urine. Yellow or orange means new fat formation. Urine comes out a clear as the water you drank means a clean body. Zero new fat cells.