I've had trouble finding briefs that fit my build, which is thin and hung. My butt has some roundness to it, not completely flat, but most briefs have huge asses on them that my ass basically swims in. The DKNY classic hip brief is great though, small ass but not too small, and a good size pouch up front. Link is below for those interested:
DKNY Classic Cotton Hip Brief 53120 - FREE Shipping
DKNY Classic Cotton Hip Brief 53120 - FREE Shipping