My bra band size is 34 but I am 5'7" with a long torso and weigh about 180 lbs., so I was really worried about it fitting. I ordered the 34, It fits perfectly. The straps come with it, you can hook them at any of the four(?)different loops along the sides. I looked for this for weeks but most of the listings for this or similar products had horrible reviews, or so few that it was clearly just bots. If you want the backless bra bodysuit, Brand is the right seller to buy from.