Does this have hooks to be able to go to the bathroom?

No, there is no bathroom access.

The size chart on amazon does not correspond with this products size chart. if i am a b accd. to size chart, what size do i order for this product?

Please refer to our size chart.https://www.amazon.com/gp/product/ajax-handlers/apparel-sizing-chart.html/ref=dp_sizechart?ie=UTF8&asin=B013EKLKPG&isUDP=1

I weight 220 and wear size 16 in pants. Would a medium work or is large better?

Hey Amanda, I would definitely go with the larger. I'm about 175 and wear a 10 size jeans and I bought a large. The large fits we comfortably, I couldn't imagine trying to squeeze into a medium. Remember you want to be comfortable in it and not struggle to get it on and off. In my opinion, go with the large. I would actually look into an XL if I were you. If it doesn't fit you can always exchange.

I bought the MD ..i figured it was medium and I weigh 142# and am about 5'5"...and it fit great- goes all the way to my bra and getting it on is a bit of a struggle, but if you don't scrunch it up like putting on hose, just slowly pull up sections of it at a time it goes on just a bit easier. once on it is very comfortable - it does not make those bulges disappear, but it controls them and makes you look firmer. I am pleased with my purchase.