I order multiple sets of these, I used the size guide to order. I usually wear a large top and a medium pant. By the size chart my measurements would be an xl in these uniforms. The tops are baggy, but not so roomy it is a problem, the pants on the other hand are HUGE. It is like walking around in a balloon. I am slowly getting them altered, the seamstress said they were not an xl, but had enought material to be about an xxl. I wish you could order mixed sizing. I could have easily ordered a large, I would"ve probably had to have pants altered, but I think it would have been better. So note if you have a petite bone structure these are oversized order down. I am 5'3 and 170lbs, and I could have easily done a large or even possibly a medium. But the quality is good!