Kelsey Hawleywrote a review of Castelli Free Aero Shorts - Women's on June 11, 2019
Familiarity: I've used it several times
These are still relatively new in my cham repetoire (~ 1 year), but so far they're still super tight (read: don't chafe) and the cham has the perfect amount of padding.
Fit: I ordered a M, and usually wear a US 2-4, or small, so I would recommend ordering up a size.
Will definitely be investing in another pair.