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Lange Size Guide
Lange Size Guide — Ski Boots
Lange is a French brand founded in 1948 in Acton (Massachusetts) by Bob Lange, pioneers of the rigid plastic ski boot. Today owned by the Rossignol group, Lange is recognized for its competition boots (RS/Z range) and high-end all-mountain models. The new Shadow (2025–2026) and XT3 ranges define the current performance standard.
Sources: lange.com, Next Adventure, Evo, Powder7, Realskiers, Powder Magazine, Ski Bartlett. Sizes in Mondopoint (cm). All measurements are foot measurements (heel to the longest toe).
Alpinstore Return Tips — Lange
- Mondopoint = foot length in cm: a foot of 26.5 cm corresponds to a size 26.5 boot. This is the universal ski boot sizing system. Do not confuse with street shoe size (EU) which varies by brand.
- Comfort fit vs performance fit: beginners order the size that corresponds exactly to their foot. Experienced skiers take a half size down for a more direct contact with the boot.
- Last (width): Lange offers 3 widths: LV 97 mm (narrow foot, competitor skier), MV 100 mm (standard foot, most common) and HV 102–104 mm (wide foot). Choosing the wrong width generates pressure points and pain. Always check the LV/MV/HV indication on the model.
- Flex index: the higher the number, the stiffer the boot. Choose your flex according to your level and weight: flex 65–85 = beginner to intermediate, flex 90–110 = advanced intermediate, flex 115–130+ = expert and committed skier.
- Liner: the liner (bootie) compresses by 5 to 10 mm with regular use. A new boot that feels a bit tight at the toes is normal and will become comfortable after a few days of skiing.
1. Mondopoint Conversion Table — Adult
Source: official Lange + Nordica/Evo (ski boot industry standard). The Mondopoint = foot length in cm, measured from heel to the longest toe. US men's and women's sizes differ by 1.5 sizes.
| Mondopoint (cm) | EU | US Men | US Women | UK |
|---|---|---|---|---|
| 22.5 | 35–36 | 4 | 5.5 | 3 |
| 23.0 | 36–36.5 | 4.5 | 6 | 3.5 |
| 23.5 | 37 | 5 | 6.5 | 4 |
| 24.0 | 38 | 5.5 | 7 | 4.5 |
| 24.5 | 38.5 | 6 | 7.5 | 5 |
| 25.0 | 39 | 6.5 | 8 | 5.5 |
| 25.5 | 40 | 7 | 8.5 | 6 |
| 26.0 | 40.5 | 7.5 | 9 | 6.5 |
| 26.5 | 41 | 8 | 9.5 | 7 |
| 27.0 | 42 | 8.5 | 10 | 7.5 |
| 27.5 | 42.5 | 9 | 10.5 | 8 |
| 28.0 | 43 | 9.5 | 11 | 8.5 |
| 28.5 | 44 | 10 | 11.5 | 9 |
| 29.0 | 44.5 | 10.5 | — | 9.5 |
| 29.5 | 45 | 11 | — | 10 |
| 30.0 | 46 | 11.5 | — | 10.5 |
| 30.5 | 46.5 | 12 | — | 11 |
| 31.0 | 47 | 12.5 | — | 11.5 |
2. Conversion Table — Junior / Child
Lange junior range (RSJ, Starlet): available sizes from 16.5 to 26.5 depending on models. Source: product data sheet Lange RSJ 50/60/65 + Starlet 50/60.
| Mondopoint (cm) | EU | US Kid | Shell Length (mm) |
|---|---|---|---|
| 16.5 | 26 | 9 | 210 |
| 17.0 | 27 | 9.5 | 215 |
| 17.5 | 28 | 10 | 220 |
| 18.0 | 28.5 | 11 | 230 |
| 18.5 | 29 | 12 | 235 |
| 19.0 | 30 | 13 | 240 |
| 19.5 | 30.5 | 1 (teen) | 240 |
| 20.0 | 31 | 1.5 | 249 |
| 20.5 | 32 | 2 | 249 |
| 21.0 | 33 | 2.5 | 258 |
| 21.5 | 34 | 3 | 258 |
| 22.0 | 35 | 3.5 | 268 |
| 22.5 | 36 | 4 | 268 |
| 23.0–25.5 | 36.5–40 | 4.5–7 | 275–298 |
Lange junior boots (RSJ 50/60/65, Starlet 50/60) use a specific lighter and narrower shell designed for children's slim calves. The shell size does not change at every half size (2 Mondopoint sizes = 1 shell size).
3. Lange Adult Boot Range 2025–2026
LV = Low Volume (97 mm, narrow foot). MV = Medium Volume (100 mm, standard). HV = High Volume (102–104 mm, wide foot). GW = Grip Walk (compatible walking sole). BSL = Boot Sole Length (sole length in mm, for binding adjustment).
| Model | Flex | Last (mm) | Available Sizes | Usage / Skier Profile |
|---|---|---|---|---|
| Shadow Range (2025–2026) — All-Mountain performance, replaces the RX range | ||||
| Shadow 85 LV GW | 85 | 97 mm | 23.5–28.5 | Intermediate, narrow foot, good grip |
| Shadow 85 MV GW | 85 | 100 mm | 23.5–28.5 | Intermediate, standard foot, comfort + performance |
| Shadow 95 MV GW | 95 | 100 mm | 23.5–29.5 | Advanced intermediate, versatile, Shadow tech |
| Shadow 110 LV GW | 110 | 97 mm | 24.5–30.5 | Expert, narrow foot, Suspension Blade + Dual Pivot |
| Shadow 110 MV GW | 110 | 100 mm | 24.5–30.5 | Expert, standard foot, balance power/comfort |
| Shadow 115 MV GW (F) | 115 | 100 mm | 22.5–27.5 | Expert women, specific women's shape |
| Shadow 130 LV GW | 130 | 97 mm | 24.5–31.5 | Advanced expert, technical off-piste, weight ~2,000 g |
| Shadow 140 Pro LV GW | 140 | 97 mm | 24.5–31.5 | Competition level, Dual Core, maximum stiffness |
| RS Range (2025–2026) — Race Performance, new generation architecture | ||||
| RS 90 SC | 90 | 100 mm | 24.5–30.5 | Short slalom (SC), 4 buckles, new gen architecture |
| RS 110 SC | 110 | 100 mm | 24.5–30.5 | Intermediate race, solid lugged shell |
| RS 120 SC | 120 | 100 mm | 24.5–30.5 | Advanced race, lugged compatible race binding |
| RS 130 LV | 130 | 97 mm | 24.5–30.5 | Expert race, lugged shell, maximum stiffness |
| XT3 Free Range — Alpine Touring (backcountry) | ||||
| XT3 Free 80 MV GW | 80 | 100 mm | 23.5–28.5 | Alpine touring, beginner-intermediate |
| XT3 Free 95 MV GW | 95 | 100 mm | 23.5–29.5 | Advanced intermediate alpine touring, 2 modes |
| XT3 Free 110 MV GW | 110 | 100 mm | 24.5–30.5 | Expert alpine touring, priority descent, Dual Core |
| XT3 Free 130 MV GW | 130 | 97 mm | 24.5–30.5 | High level alpine touring, maximum performance |
| LX Range — High Volume, comfort+ | ||||
| LX 85 HV GW (F) | 85 | 104 mm | 22.5–27.5 | Women wide foot, max comfort, 4 buckles |
| LX 95 HV GW (F) | 95 | 104 mm | 22.5–27.5 | Women wide foot, advanced intermediate |
| LX 120 HV GW | 120 | 102 mm | 24.5–30.5 | Men wide foot, expert, power+comfort |
| Concept Range — BOA, all-mountain comfort | ||||
| Concept 9.5 W GW BOA (F) | 95 | 100 mm | 22.5–27.5 | Women, BOA closure, easy to put on and adjust |
4. Lange Junior Boot Range 2025–2026
| Model | Flex | Mondopoint Sizes | EU Sizes | Profile |
|---|---|---|---|---|
| RSJ 50 | 50 | 16.5–24.5 | 26–38.5 | Initiation, all-terrain, beginner-intermediate |
| RSJ 60 | 60 | 16.5–25.5 | 26–40 | All-mountain, intermediate-advanced, 4 aluminum buckles |
| RSJ 65 | 65 | 17.5–25.5 | 28–40 | Junior race/all-mountain, replaceable toe/heel |
| Starlet 50 (F) | 50 | 16.5–24.5 | 26–38.5 | Girl initiation, feminine color, same tech as RSJ 50 |
| Starlet 60 RTL (F) | 60 | 19.0–25.5 | 30–40 | Intermediate girl, PU shell + polyolefine upper |
| RS 110/120 SC Jr. | 110–120 | 20.5–26.5 | 32–41 | Junior race, lugged shell, for competitive teens |
5. Choosing Your Lange Flex
| Flex | Level | Recommended Weight | Usage / Terrain |
|---|---|---|---|
| 50–65 | Junior, beginner | < 50 kg | Blue and red slopes, learning |
| 75–85 | Intermediate | 50–75 kg | All slopes, versatile, a few days/year |
| 90–100 | Advanced intermediate | 65–85 kg | All conditions, moderate to high speed |
| 110–120 | Expert | 75–95 kg | Off-piste, high speed, committed skiing, >15 days/year |
| 130+ | Expert competitor | >85 kg | Competition, max speed, very powerful skier |
Weight is not the only criterion: a light but very technical and aggressive skier can wear a higher flex. A heavy but beginner skier will gain nothing from taking a high flex — on the contrary, the boot will be less responsive for them. A professional boot-fitter takes into account: weight, level, aggressiveness, practice volume, and goals.
6. Key Lange Technologies
Dual Core
Patented bi-material plastic in the outer boot. Combines a rigid PU core with a softer polyolefine shell. Provides a unique rebound and elasticity sensation, making edge engagement more accessible. Present on the high-end Shadow and XT3 ranges.
Suspension Blade (Shadow)
New internal architecture of Shadow boots 2025. A flexible blade between the sole and the shell stores bending energy and releases it in the turn. Reduces the effort needed to initiate the turn and improves force transmission to the ski.
Grip Walk (GW)
Sole with front and rounded heel for normal walking without slipping off the slope. Compatible with GripWalk bindings and traditional bindings (with plates). MN (Multi Norm) standard = “GW” mention on the model.
Custom Shell
Thermo-molding of the shell performed by a Lange certified boot-fitter. The shell is heated and then molded to the skier's foot for 10–15 minutes to eliminate pressure points. Available on Shadow, XT3, and LX ranges. Reduces the break-in period by 1–2 years.
BSL (Boot Sole Length)
Length of the sole in millimeters, necessary for binding adjustment. Two boots of the same Mondopoint size can have different BSLs depending on the model. Always adjust the binding with the actual BSL, not the Mondopoint. The BSL is indicated on each boot.
Monomaterial (Junior)
The shell of Lange junior boots uses a mono-material injection adapted to small feet: lighter, more flexible, and narrower than adult shells. The toes and heels are replaceable (RSJ 65+) to extend lifespan.
7. Lange FAQ
How to choose between LV, MV, and HV at Lange?
The width of the last is the most important information after flex. LV 97 mm: narrow foot with a slim forefoot, marked volume. Ideal for “performance” feet seeking maximum contact with the boot. MV 100 mm: standard width, suitable for 60–70% of skiers. If you wear street shoes without pain on the sides, this is probably your width. HV 102–104 mm: wide forefoot, thick foot or feet with bunions. If your street shoes often pinch on the sides, choose HV. A boot-fitter can measure your foot width with a dedicated measuring device.
What is the difference between the Shadow range and the old RX range?
The RX range (2012–2024) was Lange's all-mountain reference: classic 4-buckle shell, reliable, comfortable. The Shadow range (2025–2026) replaces it with two major innovations: the Suspension Blade (internal energy blade) and the Dual Pivot that change the flex dynamics. The Shadows produce a rebound in the turn that initiates edge engagement more actively. Skiers who push hard on the front of the boot will love it; those with a more balanced technique will need some adaptation time. The Shadows are compatible with the same bindings as the RX.
My new Lange boot is painful. What to do?
A new ski boot almost always generates discomfort at first. Step 1: ensure that the buckles are not too tight — tightening them hard does not compensate for a bad fit, it cuts off circulation. Step 2: after 2–3 days, the liner compresses by 5–10 mm and many pressure points disappear. Step 3: if the pain persists at a specific point, consult a Lange certified boot-fitter for shell thermo-molding or targeted grinding. If the pain is generalized (across the width), the boot may be too narrow — consider moving to the next width up (MV instead of LV, HV instead of MV).
Are Lange boots compatible with standard bindings?
Lange boots with the GW (Grip Walk) mention are compatible with standard ISO 5355 bindings (by adding adapter plates) AND with the new Grip Walk/Walk to Ride (WTR) bindings. Boots without the GW mention are only compatible with standard ISO 5355 bindings. The XT3 Free and XT3 Tour boots have an AT sole (ISO 9523 standard) compatible only with AT bindings (Marker, Tyrolia, Salomon STH2, Look Pivot with AT kit). Always check sole/binding compatibility before purchase.
Lange data based on lange.com, Next Adventure (official Lange size guide), Evo, Powder7, Realskiers (2026 Lange Boot Brand Profile), Powder Magazine (Shadow 130 LV review), Ski Bartlett. Mondopoint sizes correspond to foot length in cm. The BSL (Boot Sole Length, in mm) is necessary for binding adjustment and is different from the Mondopoint. Lange strongly advises a professional measurement by a certified boot-fitter for any ski boot purchase.
