Great Briefs!
For me, the 2Undr Swing Shift briefs (Boxers or Long Legs) are among the best, period. 5 years ago I moved from a well known brand that was my go to for a while because they changed their sizing :( After trying a few brands (that I won't mention here) with similar features (e.g. pouch) 2Undr came on top in terms of fit, comfort, and designs. I wear 30 size pants and the Small are perfect. They are a bit on the pricey side, but If you get them on sale, they are a good deal. A word of advice though: they will last a little longer (before they start to get loose) if you can wash them on delicate cycle and air dry them in the shade. Cheers!