Get amazing Arms

I am going to order these getamazingarms online and not sure what size to order, I tried the panty hose over my flabby P O  bat wings. the size I had on were a queen size and they were very tight.  Going to try these amazing arms.Was wondering if I should order a larger size than I wear for a dress size now? some things run smaller than the actual size they are..Has anyone bought this wonderful product only to find they ordered a size to small or too big? also if you could give me some insight if you have some now, I am getting excited to go water rafting this spring and summer. I'd be willing to buy a new swimsuit in the style of a mini dress and wear the amazing arms  while in the river water if I thought I could wear this product in river water without damaging them, I will be floating on a inner tube down the river mostly ..I'm thinking they will need to be washed in gentle cycle in the wash.. since they are a nylon material just like panty hose. 

Spring must be near I am getting excited , riding my horse, camping, water rafting, a little travel with boyfriend. I want to look super this summer..thanks PeaceV Wendy

I don't know anything about sizing, but one of the women I know who had a DS bought some, so I want to make sure that you realize that these are colored and will be very visible, right...?  Quite frankly, except when she wears a sleeveless balck top and wears the black pair, it looks just plain silly even in the winter, and IMO  would look even sillier in the summer.

Lora