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Wiring supplies sold by the pack and sized by the wire
  • Priced per piece and per footEvery pack in every table, worked out for you
  • Sorted by wire gaugeFrom 24 AWG signal wire to 2/0 battery cable
  • Size charts from our own rangeFerrules, heat shrink and cable glands

Heat shrink tubing size chart

The size on a pack is the diameter before shrinking. This table adds the diameter after, for every size we make.

Diameter after shrinking is the size before divided by the shrink ratio, the maker's figure for a tube with nothing inside. Price per foot is the cheapest length we sell in that size, in our last update.
Size beforeRatioShrinks toBefore, mmAfter, mmPer foot
1/16 in2:11/32 in1.6 mm0.8 mm$0.18
3/32 in2:13/64 in2.4 mm1.2 mm$0.18
3/32 in3:11/32 in2.4 mm0.8 mm$0.31
1/8 in2:11/16 in3.2 mm1.6 mm$0.13
1/8 in3:13/64 in3.2 mm1.1 mm$0.33
3/16 in2:13/32 in4.8 mm2.4 mm$0.15
3/16 in3:11/16 in4.8 mm1.6 mm$0.33
1/4 in2:11/8 in6.3 mm3.2 mm$0.15
1/4 in3:15/64 in6.3 mm2.1 mm$0.36
3/8 in2:13/16 in9.5 mm4.8 mm$0.18
3/8 in3:11/8 in9.5 mm3.2 mm$0.48
1/2 in2:11/4 in12.7 mm6.3 mm$0.20
1/2 in3:111/64 in12.7 mm4.2 mm$0.55
5/8 in3:113/64 in15.9 mm5.3 mm$0.62
3/4 in2:13/8 in19.0 mm9.5 mm$0.27
3/4 in3:11/4 in19.0 mm6.3 mm$0.73
1 in2:11/2 in25.4 mm12.7 mm$0.57
1 in3:121/64 in25.4 mm8.5 mm$0.84
1-1/4 in2:15/8 in31.8 mm15.9 mm$0.75
1-1/4 in3:127/64 in31.8 mm10.6 mm$0.91
1-1/2 in2:13/4 in38.1 mm19.0 mm$0.85
1-1/2 in3:11/2 in38.1 mm12.7 mm$1.75
2 in2:11 in50.8 mm25.4 mm$0.95
2 in3:143/64 in50.8 mm16.9 mm$2.00

Choose a tube whose size before shrinking clears the widest part of the joint, and whose size after is smaller than the thinnest part. When one size does both with room to spare, that is the size.

Glue-lined 3:1 and 4:1 tubing seals out water. Thin 2:1 tubing stays flexible but does not seal. For a splice outdoors or on a boat, choose glue-lined.

The XHF packs in this chart