For a 5mm port with minimal tissue trauma, a single buried 4-0 monocryl suffices. Go in at the appropriate depth really through the dermis, almost half a needle-length (usually P3) back, catch the dermis, then forward right at the dermal-epidermal junction (deep to superficial) then superficial on the other side exactly across from the first stitch at the dermal-epidermal junction, almost half a needle length in catching the tissue, then down and through the dermis (to deep). The secret, like
@DoctwoB , said is in the tying and shimmying. Throw your first knot (not a surgeon knot) going along the length of the incision, creating your "V" with your long and short ends of the suture and set the short end away from you. Pull the short end away from you with the needle driver and the long end toward you with your hand, tightly. Keeping tension on the suture in your hand toward you, pull the short end back toward you tightly and then really 'shimmy', truly shifting the weight between the two back and forth; you should feel the tissue and the knot catch and see the edges approximate. This is where most people fail - not enough tension and just a willy-nilly shimmy. There should be no laxity in your suture as you pull it. Then, set your 'V' the opposite way and tie to completion. Cut on the knot. No glue required.
If it is an 8, 10,12mm port site or lots of tissue desiccation/trauma, I always do two buried sutures but not interrupted; like a buried figure of 8. Deep to superficial, superficial to deep; then deep superficial, superficial deep suturing towards myself, then tie in a similar fashion.
I am master of few things, but I always have beautiful port sites. In fact, I get a little angsty when the attending wants to close because I (probably vainly...) think I do it nicer
😉 The secret is, though, that just about anything will work adequately and usually just about everyone heals up the 5mm sites ok.