Giro Sizing Chart

Giro Size Chart

Bike Helmets - Men, Women, Youth & Infant

Measure PointX-SmallSmallMediumLargeX-LargeUniversal Fit Models
Men's (Adult)47 - 51cm51 - 55cm55 - 59cm59 - 63cm63 - 65cm54 - 61cm
Women's (Adult)47 - 51cm51 - 55cm55 - 59cm59 - 63cm63 - 65cm50 - 57cm
Youth47 - 51cm51 - 55cm50 - 57cm
Infant47 - 51cm51 - 55cm47 - 52cm
INCHES - Men's (Adult)18.5 - 20"20 - 21.65"21.65 - 23.25"23.25 - 24.8"24.8 - 25.6"21.25 - 24"
INCHES - Women's (Adult)18.5 - 20"20 - 21.65"21.65 - 23.25"23.25 - 24.8"24.8 - 25.6"19.75 - 22.5"
INCHES - Youth18.5 - 20"20 - 21.65"19.75 - 21.75"
INCHES - Infant18.5 - 20"20 - 21.65"18.5 - 20.5"


Men's Tops - Jerseys, Jackets, Base Layers, Bib Shorts etc.

Measure PointSmallMediumLargeX-LargeXX-Large
Numeric SizeSize 35Size 38Size 41
Chest (cm)83.8 - 89cm91.5 - 96.5cm99 - 104cm106.7 - 111.8cm114.3 - 119.5cm
Sleeve (cm)86.5cm89cm91.5cm92.7cm94cm
INCHES - Chest33 - 35"36 - 38"39 - 41"42 - 44"45 - 47"
INCHES - Sleeve34"35"36"36.5"37"


Men's Bottoms - Shorts, Pants, Knicks, Bib Shorts etc.

Measure PointX-SmallSmallMediumLargeX-LargeXX-LargeXXX-Large
Numeric SizeSize 28 USSize 30 USSize 32 USSize 34 USSize 36 USSize 38 USSize 40 US
Waist (cm)68.6 - 73.7cm73.7 - 83.8cm78.7 - 83.8cm83.8 - 88.9cm88.9 - 94cm94 - 99.1cm99.1 - 104.1cm
Hips (cm)83.8 - 88.9cm89.9 - 94cm96.5 - 101.6cm101.6 - 106.7cm106.7 - 111.8cm111.8 - 116.8cm116.8 - 121.9cm
INCHES - Waist27 - 29"29 - 31"31 - 33"33 - 35"35 - 37"37 - 39"39 - 41"
INCHES - Hips33 - 35"35 - 37"38 - 40"40 - 42"42 - 44"44 -46"46 - 48"


Men's Gloves

Measure PointX-SmallSmallMediumLargeX-LargeXX-Large
Palm (cm)17.8cm17.8 - 20.3cm20.3 - 22.9cm22.9 - 24.8cm24.8 - 26.7cm26.7cm +
Hand Length (cm)17.4cm or less17.4 - 18cm18.1 - 18.8cm18.9 - 19.9cm20 - 21cm21.1cm +
INCHES - Palm7" or less7 - 6"8 - 9"9 - 9.75"9.75 - 10.5"10.5" +
INCHES - Hand Length6.8" or less6.8 - 7"7 - 7.4"7.4 - 7.8"7.8 - 8.3"8.3" +


Women's Tops - Jerseys, Jackets, Base Layers, Bib Shorts etc.

Measure PointXX-SmallX-SmallSmallMediumLargeX-Large
Numeric SizeSize 2Size 4Size 6Size 8Size 10Size 12
Chest (cm)76 - 79cm81 - 84cm86 - 88cm91 - 94cm96 - 99cm101cm
Sleeve (cm)77cm79cm80cm81cm82cm83cm
INCHES - Chest30 - 31"32 - 33"34 - 35"36 - 37"38 - 39"40"
INCHES - Sleeve30.5"31"31.5"32"32.5"33"


Women's Bottoms - Shorts, Pants, Knicks, Bib Shorts etc.

Measure PointXX-SmallX-SmallSmallMediumLargeX-LargeXX-Large
Numeric SizeSize 2 USSize 4 USSize 6 USSize 8 USSize 10 USSize 12 USSize 14 US
Waist (cm)55.9 - 61cm61 - 66cm66 - 71cm71.1 - 76.2cm76.2 - 81.3cm81.3 - 86.4cm86.4 - 91.4cm
Hip (cm)81.3 - 86.4cm86.4 - 91.4cm91.4 - 96.5cm96.5 - 101.6cm101.6 - 106.7cm106.7 - 111.8cm111.8 - 116.8cm
INCHES - Waist22 - 24"24 - 26"26 - 28"28 - 30"30 - 32"32 - 34"34 - 36"
INCHES - Hip32 - 34"34 - 36"36 - 38"38 - 40"40 - 42"42 -44"44 - 46"


Women's Gloves

Measure PointSmallMediumLargeX-Large
Palm (cm)15.5 - 16.9cm17 - 18.9cm19 - 20.4cm20.5 - 21cm
Hand Length (cm)16 - 16.9cm17 - 18.4cm18.5 - 19.5cm19.6 - 20.5cm
INCHES - Palm6 - 6.7"6.7 - 7.4"7.4 - 8"8 - 8.3"
INCHES - Hand Length6.3 - 6.7"6.7 - 7.2"7.3 - 7.7"7.7 - 8"


Youth Gloves

Measure PointYouth X-SmallYouth SmallYouth MediumYouth Large
Palm (cm)14.2cm or less14.2 - 15.2cm15.2 - 16.2cm16.2cm or more
Hand Length (cm)15.5cm or less15.5 - 16cm16 - 16.5cm16.5cm or more
INCHES - Palm5.6" or less5.6 - 6"6 - 6.4"6.4" or more
INCHES - Hand Length6.1" or less6.1 - 6.3"6.3 - 6.5"6.5" or more


Caps, Hats, Headwarmers

Measure PointSmall/MediumLarge/X-Large
Head Circ. (cm)53 - 58cm59 - 65cm


Adult Socks

Measure PointSmallMediumLargeX-Large
EU Shoe SizeEU 36 - 39EU 40 - 42EU 43 - 45EU 46 - 48
US Men's ShoeUS 6US 7 - 9US 10 - 11US 12 - 14
US Women's ShoeUS 5 - 7US 8 - 10US 10 +


Men's Shoes

EU Shoe SizeUS Men's ShoeFoot LengthUK Men's Shoe
EU 39US 6.5250mmUK 5.5
EU 39.5US 7250mmUK 6
EU 40US 7.5255mmUK 6.5
EU 40.5US 7.5260mmUK 6.5
EU 41US 8260mmUK 7
EU 41.5US 8.5265mmUK 7.5
EU 42US 9270mmUK 8
EU 42.5US 9.5270mmUK 8.5
EU 43US 9.5275mmUK 8.5
EU 43.5US 10280mmUK 9
EU 44US 10.5280mmUK 9.5
EU 44.5US 11285mmUK 10
EU 45US 11290mmUK 10
EU 45.5US 11.5290mmUK 10.5
EU 46US 12295mmUK 11
EU 46.5US 12.5300mmUK 11.5
EU 47US 13300mmUK 12
EU 47.5US 13305mmUK 12
EU 48US 13.5310mmUK 12.5
EU 49US 14.5315mmUK 13.5
EU 50US 15320mmUK 14


Women's Shoes

EU Shoe SizeUS Women'sFoot LengthUK Women's
EU 36US 5230mmUK 3
EU 36.5US 5.5230mmUK 3.5
EU 37US 6235mmUK 4
EU 37.5US 6.5240mmUK 4.5
EU 38US 6.5240mmUK 4.5
EU 38.5US 7245mmUK 5
EU 39US 7.5250mmUK 5.5
EU 39.5US 8250mmUK 6
EU 40US 8.5255mmUK 6.5
EU 40.5US 8.5260mmUK 6.5
EU 41US 9260mmUK 7
EU 41.5US 9.5265mmUK 7.5
EU 42US 10270mmUK 8
EU 42.5US 10.5270mmUK 8.5
EU 43US 10.5275mmUK 8.5


How To Determine Your Size

— Tops —How To Measure
Chest Size:Measure the circumference of the fullest part of your chest being sure to keep the measuring tape horizontal.
Waist Size:Measure the circumference of the narrowest part (typically the small of your back and where your body bends side to side), being sure to keep the tape horizontal.
Sleeve:Measure from the top of your arm pit to the wrist keeping the measuring tape in contact with the skin at all times.


— Bottoms —How To Measure
Waist Size:Measure the circumference of the narrowest part (typically the small of your back and where your body bends side to side), being sure to keep the tape horizontal.
Hip Size:Measure the circumference of the fullest part of your hips, being sure to keep the tape horizontal.
Inseam Size:Indicates the distance from the top of your inner leg along the inside seam to the bottom of the leg.


— Gloves —How To Measure
Palm Size:Measure the circumference of the hand around the widest part of your palm, just below the index finger.
Hand Length:Measure from the base of your palm (where it meets your wrist) to the tip of your middle finger.


— Socks —How To Measure
Shoe Size:Most sock sizes match common shoe sizes.


— Helmets —How To Measure
Head Circumference:"Measure the circumference of your head at a spot approx 2 cm (+/- 1 inch) above the eyebrows. Choose the helmet size most closely matching your head’s circumference in the size chart. "


— Shoes —How To Measure
Shoe Size:These shoes match with common international shoe sizes.
Foot Length:Place a piece of A4 paper on the floor up against a wall. With your heel approximately 1mm away from the wall, stand on the paper and have someone place a pencil mark on it at the top of your longest toe. Do this with BOTH feet and select the shoe size for your larger foot.


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