Racing suit size guide

Every FIA suit we sell is sized on the European ladder, 44 up to 66 for men and 38 up to 50 for women. A 52 at Sparco, OMP and Alpinestars covers roughly the same chest measurement. The body cut around that chest is different at each of them, and that is where most of the wrong orders come from.

Measure these five first

Use a soft tape, keep it horizontal, and do not pull it tight. Measure over the fireproof underwear you actually drive in. OMP say the same on their own guide, and it makes a real difference on a two layer suit.

Your size in all three brands

Find your chest measurement in the left column. The height beside each size is what that brand cuts the suit for, which matters more than it looks.

The chest bands do not line up perfectly between brands. OMP set theirs about a centimetre higher than Sparco, so if your chest lands right on a boundary, read your own number off that brand’s full chart below rather than off this row.

The bit that catches people out: height

All three brands agree on the chest to within a centimetre or so. They do not agree on how tall the person wearing that chest is meant to be, and the gap grows as the sizes go up.

From size 46 upwards Alpinestars add roughly a centimetre of height per size step over Sparco, on almost identical chest measurements. So a 106 cm chest at 180 cm tall is a Sparco 54. The same chest at 185 cm is an Alpinestars 54, and a Sparco 54 on that driver will fit across the body with short arms and legs.

OMP sit outside this argument. Their height bands are 10 cm wide and overlap heavily, so height barely narrows the choice. Pick an OMP suit on chest and waist and treat the height column as a sanity check.

Full charts by brand

All measurements in centimetres, weight in kilograms. These are the manufacturers’ own published charts.

SparcoMen 44 to 66. Read the height column, Sparco size on it as much as on the chest.▼

Size	Chest	Waist	Pelvis	Thigh	Shoulder	Sleeve	Outer leg	Inside leg	Height	Weight
XS
44	86-89	74-77	86-89	45-48	37-40	54-57	97-100	72-74	164-167	54
46	90-93	78-81	90-93	47-50	39-42	56-59	98-101	73-75	167-170	60
S
48	94-97	82-85	94-97	49-52	41-44	58-61	99-102	74-76	170-173	66
50	98-101	86-87	98-101	51-54	42-46	60-63	100-103	75-77	173-176	72
M
52	102-105	88-93	102-105	54-57	45-48	62-65	101-104	76-78	176-179	78
54	106-109	94-97	106-109	56-59	47-50	64-67	102-105	77-79	179-182	84
L
56	110-113	98-101	110-113	59-62	49-52	66-69	103-106	78-80	182-185	90
58	114-117	102-105	114-117	61-64	51-54	68-71	103-107	79-81	185-188	96
XL
60	118-121	106-109	118-121	64-67	53-56	70-73	105-108	80-82	188-191	102
62	122-125	110-113	122-125	67-70	56-58	72-75	107-110	81-83	191-194	108
XXL
64	126-129	114-117	126-129	69-72	57-60	74-77	108-111	82-84	194-197	114
66	130-133	118-121	130-133	72-75	59-62	76-79	109-112	83-85	197-200	120

The waist steps unevenly between 48 and 52 on Sparco’s own chart, so check the waist column as well as the chest through that part of the range.

Sparco LadyWomen 38 to 50, with the UK and US equivalents.▼

Size	UK	US	Bust	Waist	Pelvis	Thigh	Outer arm	Inside leg	Height	Weight
38	6	2	78-81	60-63	84-87	51-52	55-58	71-73	160-162	45-49
40	6	–	82-85	64-67	88-91	52-53	56-59	72-74	162-164	50-54
42	8	4	86-89	68-71	92-95	53-54	57-60	73-75	164-166	55-59
44	8	–	90-93	72-75	96-99	55-56	58-61	74-76	166-168	60-64
46	10	6	94-97	76-79	100-103	57-58	59-62	75-77	168-170	65-69
48	10	–	98-101	80-83	104-107	59-60	60-63	76-78	170-172	70-74
50	12	8	102-105	84-87	108-111	61-62	61-64	77-79	172-174	75-79

OMPMen 42 to 64. The widest size range we stock, and the most forgiving on height.▼

Size	Chest	Waist	Hips	Thigh	Arm	Inside leg	Shoulders	Back	Height	Weight
42	83-87	67-71	80-84	46-48	57-59	68-70	41-42	46-49	150-160	50-60
44	87-91	71-75	84-88	48-50	58-60	70-72	42-43	47-50	155-165	55-65
46	91-95	75-79	88-92	51-53	60-62	72-74	44-45	48-51	158-170	60-70
48	95-99	79-83	92-96	53-55	61-63	74-76	45-46	49-52	165-175	65-75
50	99-103	83-87	96-100	56-58	63-65	76-78	47-48	50-53	170-180	70-80
52	103-107	87-91	100-104	58-60	64-66	78-80	48-49	51-54	170-183	75-85
54	107-111	91-95	104-108	61-63	66-68	80-82	50-51	52-55	177-187	83-88
56	111-115	95-99	108-112	63-65	67-69	82-84	51-52	53-56	182-190	85-92
58	115-119	99-103	112-116	66-68	69-71	84-86	53-54	54-57	185-195	87-95
60	119-123	103-107	116-120	68-70	70-72	86-88	54-55	55-58	187-198	90-100
62	123-127	107-111	120-124	71-73	72-74	87-89	56-57	56-59	190-200	95-110
64	127-131	111-115	124-128	73-75	73-75	87-89	57-60	57-60	190-200	105-115

AlpinestarsMen 40 to 66. Cut for a taller driver than Sparco at the same chest.▼

Size	Chest	Waist	Hip	Thigh	Inside leg	Outer arm	Height
40	78-82	64-68	79-83	48-49	71-72	49-50	150-156
42	82-86	68-72	83-87	49-51	72-74	50-52	156-163
44	86-90	72-76	87-91	51-53	74-76	52-54	163-167
46	90-94	76-80	91-95	53-55	76-78	54-56	167-171
48	94-98	80-84	95-99	55-57	78-80	56-58	171-175
50	98-102	84-88	99-103	57-59	80-82	58-60	175-179
52	102-106	88-92	103-107	59-61	82-84	60-62	179-183
54	106-110	92-96	107-111	61-63	84-86	62-64	183-187
56	110-114	96-100	111-115	63-65	86-88	64-66	187-191
58	114-118	100-104	115-119	65-67	88-90	66-68	191-195
60	118-122	104-108	119-123	67-69	88-90	66-68	191-195
62	122-126	108-112	123-127	69-71	90-92	69-70	195-199
64	126-130	112-116	127-131	71-73	90-92	68-70	195-199
66	130-134	116-120	131-136	73-75	90-92	68-70	195-199

Suits sized S to XXL instead

Single layer suits and mechanics suits, including the OMP OS10 and the Sparco Martini Racing mechanics suit, skip the numeric ladder. Sparco group their own chart like this, and it is the mapping we use:

Women’s suits

The Sparco Competition Lady and the OMP First Elle are both cut for a female body and both run 38 to 50, but only Sparco publish a separate women’s chart. OMP list the First Elle on a 38 to 50 ladder and then point you at their standard racing suit chart, which is a men’s block. For the Elle, send us your bust, waist and height and we will size it from those rather than guess off the wrong chart.

What changes the size you need

Layers

A two layer suit and a four layer suit in the same nominal size do not feel the same. The heavier the construction, the more of the room in the pattern the suit itself takes up. If you are between sizes on a three or four layer suit, go up.

What you wear underneath

FIA underwear is a full extra layer top and bottom. Measuring in a t-shirt and then pulling the suit on over a Nomex top and long johns is the most common reason a suit that should have fitted does not.

The car

A suit that fits standing up can still bind in a fixed back bucket with a six point harness done up. If you sit low with your knees up, the inside leg and the crotch matter more than the chest. Worth saying when you ring, because it can push the recommendation a size either way.

Charts taken from the manufacturers’ own published data, checked 2 August 2026. Sparco from sparco-official.com. OMP from the size chart on their First Evo product page. Alpinestars from the size guide on their GP Race V3 product page. Manufacturers revise these, so if a chart on a suit box disagrees with this page, the box wins and we would like to know.