First of all, I'm 5'6, fluctuate between 136lbs - 141lbs, athletic build, and I ordered a size 32 (which is my normal skinny jeans size from brands like Serenede, Black Taylor, Levis, etc for reference)
I gotta say these are my new favorite jeans. These jeans are "heavy" in the sense that you can tell they're not just some thin layer of cloth. I get a feeling they'd last a ton of washes without any breakdown of the material
The fit is perfect with these because they feel skinny from the thighs down but don't LOOK like the "squeezing the h*ll out of you" style of skinnies. I've always preferred skinny/very slim jeans out of all styles and I'll say these are PERFECT.
And yes, you can do the squat test and feel absolutely fine lol. I ordered 2 more pairs after I got my first. Can't wait for the restock