I don't know about the depth (I have a tempurpedic which isn't thick, but there is definitely room for more), but these are the ones I use and LOVE. I'm really picky about sheets - I hate flanel, I hate regular satin, jersey balls up too quick, even really high thread count is typically not soft enough for me - I've used these for about 2 years now and wash them every week. Still as good as new. I can't imagine ever using anything else.
I got my Sephora order yesterday, but I had a dinner to go to after work and didn't get home until 10:00. I had to get up at 6:00 this morning, and just didn't feel like going through everything. I pulled out the Clinique pore serum since my sample is about gone (still really loving that stuff), and I pulled out the Givenchy under eye concealer & Dior lip mazimizer as well, but left everything else in the box. I want to have time to play with it, so I'll have time after work today. First impression on the Givenchy is good! I don't have super dark circles, so it is the perfect amount of brightening that I need when I get little sleep as I did last night. First impression on the Dior gloss is good too! It's not sticky at all (which is why I tend to stay far away from glosses) and I really like the tingle of it. Oh, I also pulled out the Bumble & Bumble curl foam as well this morning, it's a really strange consistency! I thought it would be like a mousse, but it's a gel that turns sort of foamy. I REALLY need a haircut (getting one Saturday) so it's hard to tell right now because it's too long and is annoying me, but I think it has added some curl to it today. I'll report back on that after I get my haircut and get the true test.