Women's Motorcycle Jacket Sizing: Alpinestars vs Dainese vs REV'IT!

Women's motorcycle jackets for street, sport and touring riding are cut on their own charts, and the brands don't agree on what a size letter means. One brand uses letters, one uses Euro numbers with two Mediums, and one uses numbered sizes. Below are the official Alpinestars, Dainese and REV'IT! women's jacket charts side by side, with the source for every number.

The short version

Measure bust (or chest at its fullest) and natural waist, and for Alpinestars also hips [2]. Alpinestars and Dainese also list a chest measurement taken just under the armpits [2][4].
Dainese has two Mediums and two XLs. Its women's jacket chart labels Euro 44 and 46 both "M", and Euro 50 and 52 both "XL", so go by the Euro number, not the letter [4].
REV'IT! uses numbered sizes. The Eclipse 2 Ladies chart runs 34 to 46 and lists chest and waist only [6].
Don't carry a letter from one brand to another. A 95 cm bust is an Alpinestars L, a Dainese Euro 46 (labelled M) and a REV'IT! 40 on these charts [2][4][6].

How each brand says to measure

Brand	Bust / chest	Waist
Alpinestars [2]	Bust: around the fullest part of the bust, tape horizontal. Chest: around the fullest part, under the armpits, tape horizontal.	Around the natural waist line, in line with the navel, tape horizontal. Hip: fullest part of the hips, about 20 cm below the waist line.
Dainese [4]	Breast: tape under the armpits and around the shoulder blades, then over the fullest point of the breast (not horizontally). Chest: horizontally around the torso over the shoulder blades, just under the armpits.	Horizontally around the waist, just above the top of the hip bones (iliac crests), abdomen relaxed.
REV'IT! [6]	Chest: around the fullest part of your chest, tape horizontal (one chest measurement, no separate bust).	Around the narrowest part (typically where your body bends side to side), tape horizontal.

Use a soft tape over a thin layer. Our measuring guide covers bust, underbust and natural waist, and our printable tape works if you don't own one.

Alpinestars women's textile jacket chart (cm)

Size	Bust	Chest	Waist	Hip	Height
XS	78–84	74–80	58–64	82–88	157–162.5
S	84–90	80–86	64–70	88–94	162.5–168
M	90–94	86–90	70–74	94–98	168.5–172
L	94–98.5	90–94.5	74–78.5	98–102.5	172.5–176.5
XL	98.5–103	94.5–99	78.5–83	102.5–107	176.5–180.5
XXL	103–108	99–104	83–88	107–112	180.5–182.5
3XL	108–113	104–109	88–93	112–117	182.5–185
4XL	113–118	109–114	93–98	117–122	185.5–188

This is Alpinestars' "Moto Textile Jacket - Womens" size guide, linked from the Stella T-GP Plus R V4 and Stella C-1 Air product pages [1][2][3]. The same chart also lists outer arm length and an inch version. Leather jackets may use a different chart, so check the product page.

Alpinestars bust and waist in inches

Size	Bust (in)	Waist (in)
XS	30¾–33⅛	22⅞–25¼
S	33⅛–35⅜	25¼–27½
M	35⅜–37	27½–29⅛
L	37–38¾	29⅛–30⅞
XL	38¾–40½	30⅞–32⅝
XXL	40½–42½	32⅝–34⅝
3XL	42½–44½	34⅝–36⅝
4XL	44½–46½	36⅝–38⅝

Dainese women's jacket chart (cm)

Euro	Letter	US (Dainese's row)	Breast	Chest	Waist	Arm	Height
38	XXS	2	76–80	72–76	56–60	51–52	157–160
40	XS	4	80–84	76–80	60–64	52–54	160–163
42	S	6	84–88	80–84	64–68	54–55	163–166
44	M	8	88–92	84–88	68–72	55–57	166–168
46	M	10	92–96	88–92	72–76	57–58	168–170
48	L	12	96–100	92–96	76–80	58–59	170–173
50	XL	14	100–104	96–100	80–84	59–60	173–174
52	XL	16	104–108	100–104	84–88	60–61	174–175
54	XXL	18	108–112	104–108	88–92	60–61	175–176

From the "Motorbike Jackets - Woman" size guide on Dainese's US product pages for the Tempest 4 D-Dry Woman and Avro 5 Tex women's jackets (the same chart on both) [4][5]. Dainese's chart also lists UK sizes (6 to 22) and has an inch view. It lists no hip measurement.

REV'IT! Eclipse 2 Ladies chart (cm)

Size	Chest	Waist
34	81–85	63–67
36	85–89	67–71
38	89–93	71–75
40	93–97	75–79
42	97–101	79–83
44	101–106	83–88
46	106–112	88–94

REV'IT! puts a size guide on each product page, and they aren't all the same: the Afterburn 2 H2O Ladies jacket page lists a hip column too [7]. Use the guide on the exact jacket you're buying [6]. Our REV'IT! sizing guide covers the brand's cut in more detail.

Worked examples (straight from the charts)

Each row uses the bust or fullest-chest measurement (Alpinestars "bust", Dainese "breast", REV'IT! "chest") and the waist. Remember that Dainese measures the breast over its fullest point rather than horizontally, so your Dainese number can differ a little from a horizontal tape.

Bust / waist	Alpinestars	Dainese	REV'IT! Eclipse 2 Ladies
87 cm / 66 cm	S (bust 84–90, waist 64–70)	42 / S (breast 84–88, waist 64–68)	Chest says 36 (85–89), waist says 34 (63–67)
95 cm / 77 cm	L (bust 94–98.5, waist 74–78.5)	Breast says 46 / M (92–96), waist says 48 / L (76–80)	40 (chest 93–97, waist 75–79)
102 cm / 85 cm	Bust says XL (98.5–103), waist says XXL (83–88)	Breast says 50 / XL (100–104), waist says 52 / XL (84–88)	44 (chest 101–106, waist 83–88)

The same body lands on a different letter or number at each brand, and sometimes bust and waist point to different rows on the same chart. The size guides we checked don't say which measurement decides in that case, so check the product page or ask the retailer.

How to choose

Measure bust, chest under the arms, natural waist and hips once, in cm if you can. Most of these charts are in cm.
Look each one up on the brand's own chart, not the size you wear at another brand.
Use the chart on the exact product page. Alpinestars' chart here is for women's textile jackets [2], and REV'IT! charts vary by product [6].
If two measurements disagree, read the product's own fit notes or ask the retailer. Yardstick's size tools (free account) use a brand's own chart where we've loaded it and say so when we haven't (how we size).

Common questions

Is a women's Medium the same at every brand?

No. On Alpinestars' women's textile jacket chart, M is a 90 to 94 cm bust. Dainese's women's jacket chart labels two sizes M: Euro 44 (88 to 92 cm breast) and Euro 46 (92 to 96 cm). The REV'IT! Eclipse 2 Ladies chart doesn't use letters at all; it uses sizes 34 to 46. Look up your measurements on each brand's own chart.

How do I measure my bust for a motorcycle jacket?

The brands describe it differently. Alpinestars says to measure around the fullest part of the bust with the tape horizontal. Dainese says to put the tape under the armpits and around the shoulder blades, then over the fullest point of the breast, not horizontally. REV'IT!'s chart has one chest measurement, around the fullest part of your chest with the tape horizontal.

What if my bust and waist point to different sizes?

The size guides we checked don't say which measurement decides. Check the chart on the exact product page and the product's own fit notes, or ask the retailer before you buy.

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Sources

Alpinestars: Women Stella T-GP Plus R V4 Jacket, size guide on the product page
Alpinestars: Size guide, Moto Textile Jacket, Womens (image) (cm and inches, how to measure)
Alpinestars: Stella C-1 Air Jacket product page (links the same size guide)
Dainese: Tempest 4 D-Dry Jacket Woman, size guide on the product page ("Motorbike Jackets - Woman", cm, how to measure)
Dainese: Avro 5 Tex women's jacket product page (same chart)
REV'IT!: Eclipse 2 Ladies jacket, size guide on the product page (chest and waist in cm, how to measure)
REV'IT!: Afterburn 2 H2O Ladies jacket, size guide on the product page (chest, waist and hip columns)

All numbers above are copied from the brands' published charts; we don't add our own conversions. We didn't include Klim here because the Klim women's jacket page we checked didn't show which chart applies. Charts change. Always check the chart on the exact product page before you buy. Last checked November 2, 2026.