These are the BEST Yoga pants EVER! I was first introduced to them after I happened to find a pair randomly at Ross one day. I wore the heck out of those things, to the grocery store, around the house, during tennis with my husband, when I took my dogs for a walk, etc... and after many washings and wearings I realized I had better get another pair. Unfortunately however, I was saddened to find that since Ross only carries random products, they did NOT have a second pair of these pants on their shelf. Turns out I had to take my search for the BEST Yoga Pants ever online to Amazon.com. With the brand name and the style number off the tag it didn't take me long to find the exact product I already owned for $19.99 on Amazon, which just so happens to be the same price I paid at Ross (what a DEAL!). So I ordered another pair and I wore the heck out of those as well. Even wearing them so often though, I must note that the color and elasticity of the fabric maintained itself very well. I could wear them for 5 days in a row after work and wash them once a week and they'd maintain perfect shape day after day. After I found myself pregnant with my first child, I ordered 2 more pair because I knew I'd want something comfortable to wear while my body was undergoing all the changes. Then, during the 7th, 8th, and 9th month of my pregnancy, when the belly bump drops and things start to get quite uncomfortable, these yoga pants SAVED MY LIFE! I literally wore them EVERY SINGLE DAY, but I made a new outfit of it by pairing them with cute Roxy sandals, a solid v-neck maternity top, and a white cami underneath to smooth things out. The yoga pant material was thin enough that I didn't get hot, even in the hundred degree heat of June, yet thick enough that it was flattering to my curves, despite my 50 pound baby weight gain. I currently own 6 pairs of these yoga pants in varying sizes, and they've all been SOOOOOO fantastic that I've even ordered and had them shipped to friends and family via Amazon.com. As for the sizing, when I wore a size 6-7 jeans pre-pregnancy I fit into the Medium yoga pants. When I wore size 8-9 jeans during early-pregnancy I wore the Large yoga pants. And during the later part of my pregnancy, and I assume for awhile after the baby is born also, I've worn the Extra Large size yoga pants mostly the entire time. These yoga pants took the guess work out of "what to wear?" everyday because they were comfortable, flattering, and paired with a different color top, I had a new outfit every time. Not to mention, they don't LOOK like gym clothes! They don't have stripes or huge obvious logos on them, so they just appear to be a casual pair of black pants, which I think are perfectly acceptable to wear out EVERYWHERE I go. Whether it's a restaurant, the grocery store, or a family function. I love them, and you will too!! PS. Please note, this is my first Amazon product review. I felt compelled to take the time to write this because, first of all, these pants are the best thing since sliced bread, and secondly, I'm an avid online shopper and I make ALL my purchases based on other people's good reviews. So here's hoping the men of the world come across my review, discover these awesome yoga pants, and buys them for every woman they know and love!