What size for your ski boots - Tips

Not sure which ski boot size to choose or confused by the different widths available?

Choosing ski boots in the correct size is essential. Any professional will tell you that an ill-fitting boot is uncomfortable. If it is too large, your foot will tend to move around, causing discomfort around the forefoot, ankle bones and instep. Conversely, if it is too small, your toes will be crushed, restricting blood circulation and making your feet feel cold.

Key points to consider

Choosing ski boots in the correct size is essential to prevent pain, a lack of precision and cold feet.
Mondopoint (Mondo) sizing corresponds to foot length in centimetres and is the standard used for ski boots, providing greater accuracy than EU/UK/US sizing.
To determine your Mondopoint size, use the Glisshop foot-measuring template.
By reading the template, you can find your Mondopoint size and determine whether you have narrow, medium-width or wide feet.
For length, an expert skier should choose a boot matching the measured foot length, while a recreational skier can add approximately 0.5 cm for extra comfort.
The fit volume is based on the shell width across the metatarsals (measured at size 26.5) and allows different models to be compared.
As a guide: narrow feet ≈ 97–100 mm, medium-width feet ≈ 100–102 mm and wide feet ≈ 102 mm and above. Adjust this according to whether you prioritise precision or comfort.

In this guide, Renaud, our alpine and ski touring expert, helps you choose the right ski boot size and determine your exact fit.

EU/Mondo converter

EU Size - Mondopoint Conversion

Brand

Mondopoint Size: 21

32 48

Selected EU Size: 34

Ski boot sizes may vary slightly from one manufacturer to another. If you have any doubts, feel free to contact one of our experts by phone, chat, or email.

Size conversions by brand

Mondopoint (cm)	Rossignol	Lange	Salomon	Atomic	K2	Head	Tecnica	Nordica
20.5	32.5	32.5	33	32	33	32 (1/3)	33	32
21	33	33	33 (2/3)	33		33	34	33
21.5	34	33.5	34 (1/3)	34	34.5	33 (2/3)	35	34
22	35	34.5	35	34.5		34 (1/2)	35.5	35
22.5	35.6	35 (1/3)	36	35	36	35 (1/3)	36	36
23	36	36	36 (2/3)	36		36	36 (2/3)	36.5
23.5	37	36 (2/3)	37	37	37.5	36 (2/3)	37.5	37
24	38	37.5	38	37.5		37 (1/2)	38	38
24.5	38.5	38 (1/3)	39	38	39	38 (1/2)	38 (2/3)	38.5
25	39	39	39 (2/3)	39		39	39.5	39
25.5	39.5	39 (2/3)	40 (1/3)	40	40.5	39 (2/3)	40	40
26	40	40.5	41	40.5		40 (1/2)	40 (2/3)	40.5
26.5	41	41	42	41	41.5	41 (1/3)	41.5	41
27	42	42	42 (2/3)	42		42	42	42
27.5	42.5	42 (2/3)	43 (1/3)	43	42.5	42 (2/3)	42.5	42.5
28	43	43.5	44	43.5		43 (1/3)	43 (1/3)	43
28.5	43.5	44 (1/3)	45	44	44	44 (1/3)	44	44
29	44	45	45 (2/3)	45		45	44.5	44.5
29.5	45	45 (2/3)	46 (1/3)	46	45.5	45 (2/3)	45	45
30	46	46	47	46.5		46 (1/2)	45 (2/3)	45.5
30.5	47	47 (1/3)	48	47	47.5	47 (1/3)	46.5	46
31	48	48	48 (2/3)	48		48	47	47

Ski boot sizes may vary slightly from one manufacturer to another. If you have any doubts, please contact one of our advisers by phone, live chat or email.

What is Mondopoint sizing and why does it replace conventional shoe sizes?

Mondopoint sizing, often shortened to ‘Mondo’, is an international measurement system used primarily for ski boots. It represents foot length in centimetres. For example, a Mondo size of 27.5 corresponds to a foot measuring 27.5 cm long. This system provides greater accuracy and worldwide consistency than conventional sizing standards, which vary from country to country, such as US, UK and EU sizes. By using Mondo sizing, skiers and ski boot manufacturers can ensure a more suitable fit, delivering better performance and comfort regardless of regional size variations.

Which ski boot size should you choose in centimetres?

How do you determine your Mondopoint size?

To eliminate the uncertainty associated with UK, US and EU sizing standards, ski boots use a system known as Mondopoint, which corresponds to foot length in centimetres.

That is why Glisshop provides a foot-measuring template to measure the length and width of your feet accurately. It is available in-store, and we also offer a PDF version online.

To use the PDF foot-measuring template, first check that it has printed to scale and that 1 cm on the paper is exactly equal to 1 cm on a ruler. Then place it against a wall and position your larger foot on it. Draw one line at the end of your longest toe and another at the widest point of your foot. Ask someone to help if necessary, as this will make the measurements and readings more accurate.

To find your ski boot size, simply check where the first line at the front of your foot falls and note the corresponding Mondopoint (MP) value. Measuring foot width requires a slightly different approach. Find the point where the second line you drew at the side intersects the pre-printed marking for your size. This intersection indicates whether your foot is narrow, medium-width or wide. Feel free to watch the video several times to make sure you understand the process.

You now know your Mondopoint size and can determine which boot size and width to choose.

pedimetre-glisshop_en [PDF — 526 Ko]

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What is last volume?

Fit volume refers to the internal space within a ski boot, including its width, height and depth, designed to accommodate the foot. It is crucial when assessing comfort, as two boots in the same size may have different internal volumes.

Which ski boot length should you choose?

The length of your ski boot should above all be suited to your ability level.

For this purpose, we can distinguish between two types of skier:

Expert skiers: as they generally prioritise precision over comfort, they should choose a boot that exactly matches the size measured using the foot-measuring template. For example, an expert skier with a 27 cm foot should select a Mondopoint size 27 boot.
Recreational skiers: as they tend to favour comfort without sacrificing precision, they can allow an extra half-centimetre. For example, a recreational skier with a 27 cm foot should choose a Mondopoint size 27.5 boot.

Which ski boot width should you choose?

The width of your ski boot must also suit your foot shape.

Most brands offer several ski boot ranges with different fit volumes. Some models are designed for narrow feet, others for average-width feet and others for wide feet. This means every skier can find the right fit and enjoy lasting comfort.

The last volume, or fit, is based on the boot's width across the metatarsals. Ski boot last width is always stated for the reference size of 26.5, even if you choose a smaller or larger boot. The last measurement is primarily a guide for comparing models and makes it easier to find the width that best matches your foot shape.

However, as fit volume is proportional to each boot size, it varies from one size to another. If the last width is 100 mm for a Mondopoint size 26.5 boot, it will be less than 100 mm in sizes below 26.5 and greater than 100 mm in larger sizes.

Using the Glisshop foot-measuring template, you can accurately determine the width of your foot and establish whether it is narrow, medium-width or wide.

If you have narrow feet, we recommend choosing shells with a 97, 98 or even 100 mm last.
If you have medium-width feet, ski boots with a 100 or 102 mm last will generally be the best choice.
If you have wide feet, opt for a shell with a last exceeding 102 mm to achieve the comfort required for long days on the slopes.

These fit volumes are, of course, provided as a guide only. If you enjoy skiing hard on red and black runs from morning until evening, you can opt for a slightly tighter fit to improve precision. Conversely, if comfort is your priority, choose a measurement towards the upper end of the recommended range. In addition to this length and width information, always check any model-specific fitting recommendations.