√ Surgery : Suture Sizes And When To Use Them

USP SIZES	SIZE IN MM	SUGGESTED INDICATION
11-0 & 10-0	0.01 & 0.02	Ophthalmology, microsurgical repair
9-0 & 8-0	0.03 & 0.04	Ophthalmology, microsurgical repair
7-0 & 6-0	0.05 & 0.07	Small vessel repair/grafting, fine suturing on the hand/nailbed & face
5-0 & 4-0	0.1 & 0.15	Larger vessel repair, skin closure (hands/limbs, face) tendon repair
3-0 & 2-0	0.2 & 0.3	Closure of thick skin, fascia, muscle, tendon repair
0 & 1	0.35 & 0.4	Closure of fascia, drain stitches
2 and above	>0.5	Large tendon repairs, thick fascial closures, drain sutures (usually orthopaedic surgery)