I hope I ain't too late to the party but SBDs are the way to go. Sizing however is pretty darn crucial. It really depends on what you're looking for. For me, I get a good 5kgs - 10kgs out of my knee sleeves alone.
My knee joint measures at 38cm and under the tight fit, it's supposedly a size Medium. That being said, I currently own a size Small. I'm about 70% sure that I can fit in an XSmall (not gonna drop another $100 on it though). But back to my previous point, it depends on what's the purpose of the sleeves, if you're using it solely for comfort and keeping the joints warm, I'd suggest something cheaper unless you've money to spare. If you're using it so you can squat more weight raw (pretty ironic huh), I'd suggest you go with a tight fit and maybe even one size down. As for how to put it on, it's gonna be a bitch, you can trust me on that but I've found a way. I might upload a video if anyone were to request. For the most part, you're not even gonna get it anywhere past your calve if you buy an appropriately tight sleeve.