{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "heat-shrink-tubing-sizes",
 "name": "Heat shrink tubing sizes: supplied and recovered inside diameter, 2:1 and 3:1, 3/64 to 4 in (TE VERSAFIT)",
 "kind": "standard",
 "category": "Electronics",
 "group": "Wiring & connectors",
 "year": null,
 "question": "What are the supplied and recovered inside diameters of heat shrink tubing (1/8, 1/4, 3/8, 1/2 in), 2:1 and 3:1?",
 "tags": [
  "heat shrink",
  "tubing",
  "heatshrink",
  "wire",
  "insulation",
  "sleeve",
  "tote"
 ],
 "aliases": [
  "heat shrink tubing size chart",
  "heat shrink sizes",
  "heat shrink 1/4 inch recovered diameter",
  "heat shrink 3:1 sizes",
  "heat shrink 2:1 sizes",
  "heat shrink 3/16 inside diameter",
  "heat shrink supplied vs recovered",
  "heat shrink 1/2 inch",
  "heat shrink 3/8",
  "heatshrink size for 12 awg",
  "shrink tube diameter chart mm",
  "heat shrink size for ring terminal",
  "heat shrink tubing 6 mm",
  "heat shrink tubing 3 mm"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/heat-shrink-tubing-sizes/",
 "sheet_txt": "https://xemstudio.com/objects/heat-shrink-tubing-sizes/sheet.txt",
 "sheet": {
  "basis": "TE Connectivity VERSAFIT 2:1 and 3X (3:1) size tables as printed; Zoro generic chart as a nominal comparison",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Heat-shrink tubing is sold by its supplied (expanded) inside diameter. The tube shrinks until it meets the object, up to the fully recovered diameter; pick a size whose supplied ID is larger than the biggest part to cover (a connector or lug) and whose recovered ID is smaller than the smallest wire to grip. The wall thickness is the nominal wall after recovery.",
   "Tables: TE Connectivity's VERSAFIT 2:1 standard sizes (3/64 to 4 in) and VERSAFIT 3X 3:1 standard sizes (1/8 to 1 in), both from their data sheets as printed: supplied ID is a minimum, recovered ID a maximum, wall is nominal after recovery. The last column is computed (supplied ÷ recovered). A 3:1 tube is not exactly 3 on every row because the sheet's limits are not the same quantities.",
   "Generic sizes differ from the maker's: Zoro's size chart lists nominal expanded / recovered IDs (e.g. 1/4 in: 6.35 / 3.18 mm; 1/2 in: 12.7 / 6.35 mm) while TE's 2:1 sheet prints 6.81 / 3.17 and 13.32 / 6.35 for the same names. Size names are nominal; use the maker's minimum supplied ID if the part must slip inside.",
   "Left out: 4:1 and 6:1 adhesive-lined (dual-wall) tubing, shrink temperature and longitudinal change, flame-retardant and fluoropolymer grades. No files: tubing is a hollow cylinder before and after recovery, and the supplied wall is not given.",
   "McMaster-Carr heat-shrink categories are linked below."
  ],
  "table": {
   "columns": [
    "ratio",
    "size",
    "supplied ID (min), mm",
    "recovered ID (max), mm",
    "recovered wall (nom), mm",
    "supplied / recovered"
   ],
   "rows": [
    [
     "2:1",
     "3/64 in",
     "1.43",
     "0.58",
     "0.4",
     "2.47"
    ],
    [
     "2:1",
     "1/16 in",
     "1.65",
     "0.79",
     "0.43",
     "2.09"
    ],
    [
     "2:1",
     "3/32 in",
     "2.59",
     "1.17",
     "0.51",
     "2.21"
    ],
    [
     "2:1",
     "1/8 in",
     "3.23",
     "1.57",
     "0.51",
     "2.06"
    ],
    [
     "2:1",
     "3/16 in",
     "4.91",
     "2.36",
     "0.51",
     "2.08"
    ],
    [
     "2:1",
     "1/4 in",
     "6.81",
     "3.17",
     "0.64",
     "2.15"
    ],
    [
     "2:1",
     "3/8 in",
     "9.76",
     "4.74",
     "0.64",
     "2.06"
    ],
    [
     "2:1",
     "1/2 in",
     "13.32",
     "6.35",
     "0.64",
     "2.10"
    ],
    [
     "2:1",
     "5/8 in",
     "16.5",
     "8",
     "0.76",
     "2.06"
    ],
    [
     "2:1",
     "3/4 in",
     "20.05",
     "9.52",
     "0.76",
     "2.11"
    ],
    [
     "2:1",
     "1 in",
     "26.4",
     "12.7",
     "0.88",
     "2.08"
    ],
    [
     "2:1",
     "1-1/4 in",
     "32.7",
     "15.88",
     "1.01",
     "2.06"
    ],
    [
     "2:1",
     "1-1/2 in",
     "39.08",
     "19.05",
     "1.01",
     "2.05"
    ],
    [
     "2:1",
     "2 in",
     "51.83",
     "25.4",
     "1.14",
     "2.04"
    ],
    [
     "2:1",
     "3 in",
     "77.49",
     "38.1",
     "1.27",
     "2.03"
    ],
    [
     "2:1",
     "4 in",
     "102.84",
     "50.08",
     "1.39",
     "2.05"
    ],
    [
     "3:1",
     "1/8 in",
     "3.2",
     "1.1",
     "0.58",
     "2.91"
    ],
    [
     "3:1",
     "1/4 in",
     "6.4",
     "2.2",
     "0.58",
     "2.91"
    ],
    [
     "3:1",
     "3/8 in",
     "9.5",
     "3.2",
     "0.61",
     "2.97"
    ],
    [
     "3:1",
     "1/2 in",
     "12.7",
     "4.3",
     "0.61",
     "2.95"
    ],
    [
     "3:1",
     "3/4 in",
     "19.1",
     "6.4",
     "0.61",
     "2.98"
    ],
    [
     "3:1",
     "1 in",
     "25.4",
     "8.5",
     "0.64",
     "2.99"
    ]
   ]
  }
 },
 "sheet_text": "Heat shrink tubing sizes: supplied and recovered inside diameter, 2:1 and 3:1, 3/64 to 4 in (TE VERSAFIT) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/heat-shrink-tubing-sizes/  (sheet CC BY 4.0)\nBasis: TE Connectivity VERSAFIT 2:1 and 3X (3:1) size tables as printed; Zoro generic chart as a nominal comparison\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Heat-shrink tubing is sold by its supplied (expanded) inside diameter. The tube shrinks until it meets the object, up to the fully recovered diameter; pick a size whose supplied ID is larger than the biggest part to cover (a connector or lug) and whose recovered ID is smaller than the smallest wire to grip. The wall thickness is the nominal wall after recovery.\n- Tables: TE Connectivity's VERSAFIT 2:1 standard sizes (3/64 to 4 in) and VERSAFIT 3X 3:1 standard sizes (1/8 to 1 in), both from their data sheets as printed: supplied ID is a minimum, recovered ID a maximum, wall is nominal after recovery. The last column is computed (supplied ÷ recovered). A 3:1 tube is not exactly 3 on every row because the sheet's limits are not the same quantities.\n- Generic sizes differ from the maker's: Zoro's size chart lists nominal expanded / recovered IDs (e.g. 1/4 in: 6.35 / 3.18 mm; 1/2 in: 12.7 / 6.35 mm) while TE's 2:1 sheet prints 6.81 / 3.17 and 13.32 / 6.35 for the same names. Size names are nominal; use the maker's minimum supplied ID if the part must slip inside.\n- Left out: 4:1 and 6:1 adhesive-lined (dual-wall) tubing, shrink temperature and longitudinal change, flame-retardant and fluoropolymer grades. No files: tubing is a hollow cylinder before and after recovery, and the supplied wall is not given.\n- McMaster-Carr heat-shrink categories are linked below.\n\nratio  size  supplied ID (min), mm  recovered ID (max), mm  recovered wall (nom), mm  supplied / recovered\n2:1  3/64 in  1.43  0.58  0.4  2.47\n2:1  1/16 in  1.65  0.79  0.43  2.09\n2:1  3/32 in  2.59  1.17  0.51  2.21\n2:1  1/8 in  3.23  1.57  0.51  2.06\n2:1  3/16 in  4.91  2.36  0.51  2.08\n2:1  1/4 in  6.81  3.17  0.64  2.15\n2:1  3/8 in  9.76  4.74  0.64  2.06\n2:1  1/2 in  13.32  6.35  0.64  2.10\n2:1  5/8 in  16.5  8  0.76  2.06\n2:1  3/4 in  20.05  9.52  0.76  2.11\n2:1  1 in  26.4  12.7  0.88  2.08\n2:1  1-1/4 in  32.7  15.88  1.01  2.06\n2:1  1-1/2 in  39.08  19.05  1.01  2.05\n2:1  2 in  51.83  25.4  1.14  2.04\n2:1  3 in  77.49  38.1  1.27  2.03\n2:1  4 in  102.84  50.08  1.39  2.05\n3:1  1/8 in  3.2  1.1  0.58  2.91\n3:1  1/4 in  6.4  2.2  0.58  2.91\n3:1  3/8 in  9.5  3.2  0.61  2.97\n3:1  1/2 in  12.7  4.3  0.61  2.95\n3:1  3/4 in  19.1  6.4  0.61  2.98\n3:1  1 in  25.4  8.5  0.64  2.99\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- TE Connectivity (Mouser copy): VERSAFIT 2:1 standard sizes: supplied ID min, recovered ID max, recovered wall — web — Publisher's page; dimensions are facts — https://www.mouser.com/datasheet/2/418/6/ENG_CD_VERSAFIT_2_TO_1_RATIO_STD_SIZES_A-2059685.pdf\n- TE Connectivity (Mouser copy): VERSAFIT 3X (3:1) standard sizes: supplied ID min, recovered ID max, recovered wall — web — Publisher's page; dimensions are facts — https://www.mouser.com/datasheet/2/418/6/ENG_CD_VERSAFIT_3X_3_TO_1_RATIO_STANDARD_S_A-2059734.pdf\n- Zoro: Heat-shrink tubing size charts: nominal expanded and recovered ID — web — Publisher's page; dimensions are facts — https://www.zoro.com/resourcehub/heat-shrink-tubing-size-charts/\n- McMaster-Carr: Heat-shrink tubing (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/cord-insulation\n\nNo true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.\nAPI: https://xemstudio.com/api/geometry?object=heat-shrink-tubing-sizes\n",
 "sources": [
  {
   "publisher": "TE Connectivity (Mouser copy)",
   "title": "VERSAFIT 2:1 standard sizes: supplied ID min, recovered ID max, recovered wall",
   "url": "https://www.mouser.com/datasheet/2/418/6/ENG_CD_VERSAFIT_2_TO_1_RATIO_STD_SIZES_A-2059685.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "TE Connectivity (Mouser copy)",
   "title": "VERSAFIT 3X (3:1) standard sizes: supplied ID min, recovered ID max, recovered wall",
   "url": "https://www.mouser.com/datasheet/2/418/6/ENG_CD_VERSAFIT_3X_3_TO_1_RATIO_STANDARD_S_A-2059734.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Zoro",
   "title": "Heat-shrink tubing size charts: nominal expanded and recovered ID",
   "url": "https://www.zoro.com/resourcehub/heat-shrink-tubing-size-charts/",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Heat-shrink tubing (free STEP/IGES per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/cord-insulation",
   "formats": [
    "STEP",
    "IGES",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "wago-221-lever-connectors",
  "faston-quick-connect-tabs",
  "ring-tongue-terminals-by-stud-and-wire",
  "silicone-tube",
  "cable-and-plug-sizes",
  "cable-glands-metric-thread"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no tolerance added)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no tolerance added. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn. Typical accuracy by process and ISO 286 fits: https://xemstudio.com/tolerances/",
 "mating": [
  {
   "feature": "3:1 heat shrink, 1/4 in",
   "exact": "supplied ID min 6.4, recovered ID max 2.2",
   "mates": "wire or lug between 2.2 and 6.4 mm",
   "fit": "clamp",
   "files": "all"
  },
  {
   "feature": "2:1 heat shrink, 1/4 in",
   "exact": "supplied ID min 6.81, recovered ID max 3.17",
   "mates": "wire or lug between 3.17 and 6.81 mm",
   "fit": "clamp",
   "files": "all"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. ISO 286 equivalent: H7/p6 (locational interference) or tighter.",
  "slide": "assembles by hand and is held by a grub, pinch or clamp: shaft in a hub, rod in a socket, spigot in a bore. ISO 286 equivalent: H7/g6 or H7/h6.",
  "run": "turns or slides in use: pin in a link, rod through a guide. ISO 286 equivalent: H8/f7 (close running).",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. ISO 286 equivalent: H9/d9 (free running) or looser.",
  "clamp": "split part that closes on the mating part with screws: make it at size.",
  "designed": "a gap that is part of the design (piston fit option, displacer gap, air gap): do not change."
 },
 "faq": [
  {
   "q": "What is the recovered diameter of 1/4 in heat shrink?",
   "a": "TE 2:1: 3.17 mm (supplied 6.81 mm). TE 3:1: 2.2 mm (supplied 6.4 mm)."
  },
  {
   "q": "What does 3:1 mean?",
   "a": "The tube shrinks to about a third of its supplied diameter; the table shows supplied ÷ recovered."
  },
  {
   "q": "What size heat shrink for a 3.2 mm wire?",
   "a": "Pick a size whose supplied ID is above the widest part and whose recovered ID is below 3.2 mm: for example 3/16 in 2:1 (supplied 4.91 mm min, recovered 2.36 mm max)."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/heat-shrink-tubing-sizes/index.md"
}