A guide to Sperry boat shoe sizing

US	UK	EUR	IN	CM
5	4	35	8.8	22.2
6	3	36	9	22.9
6.5	4	37	9.3	23.6
7	4.5	37.5	9.4	23.9
7.5	5	38	9.6	24.4
8	5.5	38.5	9.7	24.6
8.5	6	39	9.8	24.9
9	7	40	10.1	25.7
10	8	41	10.3	26.2
10.5	9	42	10.5	26.7
11	9.5	42.5	10.7	27.2
12	10.5	43	11	27.9
13	11.5	44	11.3	28.7

Size	US
S	5-6
M	7-8
L	9-10

US	UK	EUR	IN	CM
7	6	39	9.7	24.6
7.5	6.5	40	9.8	24.9
8	7	41	10	25.4
9	8	42	10.4	26.4
9.5	8.5	42.5	10.5	26.7
10	9	43	10.7	27.2
10.5	9.5	43.5	10.9	27.7
11	10	44	11.1	28.2
12	11	45	11.4	29.0
13	12	46	11.7	29.7
14	13	47	12	30.5

US	Length (in)	Length (cm)	Medium width (in)	Wide width (in)
1	3 1/2	9	4 3/4	x
2	3 7/8	9.9	5	x
3	4 1/4	10.7	5 1/8	x
4	4 5/8	11.6	5 3/8	x

US	Length (in)	Length (cm)	Medium width (in)	Wide width (in)
3.5	4 3/8	11.2	5 1/4	5 1/2
4	4 5/8	11.6	5 3/8	5 1/2
4.5	4 3/4	12	5 1/2	5 5/8
5	4 7/8	12.4	5 1/2	5 3/4
5.5	5 1/8	12.9	5 5/8	5 7/8
6	5 1/4	13.3	5 3/4	5 7/8
6.5	5 3/8	13.7	5 7/8	6
7	5 5/8	14.1	5 7/8	6 1/8
7.5	5 3/4	14.6	6	6 1/4
8	5 7/8	15	6 1/8	6 1/4
8.5	6 1/8	15.4	6 1/4	6 3/8
9	6 1/4	15.8	6 3/8	6 1/2
9.5	6 3/8	16.3	6 1/2	6 3/8
10	6 5/8	16.7	6 5/8	6 5/8

US	Length (in)	Length (cm)	Medium width (in)	Wide width (in)	Approx. Age
10.5	6 3/4	17.1	6 5/8	6 5/8
11 Kids	6 7/8	17.5	6 5/8	6 3/4	4–5 years
11.5	7 1/8	18	6 3/4	6 7/8
12 Kids	7 1/4	18.4	6 7/8	7	5–6 years
12.5	7 3/4	18.8	7 1/8	7
13 Kids	7 5/8	19.2	7 1/4	7 3/8	6–7 years
13.5	7 3/4	19.7	7 3/8	7 1/2
1 Youth	7 7/8	20.1	7 1/2	7 5/8	7–8 years
1.5	8 3/8	20.5	7 5/8	7 3/4
2 Youth	8 1/4	20.9	7 3/4	7 7/8	8–9 years
2.5	8 3/8	21.3	7 7/8	8
3 Youth	8 5/8	21.8	8	8 1/8	9–10 years
3.5	8 3/4	22.2	8 1/8	8 1/4
4 Youth	8 7/8	22.6	8 1/4	8 3/8	10–11 years
4.5	9 1/8	23.1	8 3/4	8 1/2
5 Youth	9 1/4	23.5	8 1/2	8 5/8	11–12 years
5.5	9 3/8	23.9	8 5/8	8 3/4
6 Youth	9 5/8	24.3	8 7/8	8 7/8	12–13 years
6.5	9 3/4	24.8	8 7/8	9
7	9 7/8	25.2	9	9 1/8

Size	XS	S	M	L	XL
Ring Size	5	6	7	8	9
Diameter (mm)	15 mm	16 mm	17 mm	18 mm	19 mm

Size	S	M	L
Ring Size (Reg)	4	5	6
Diameter (mm)	-	-	-

Size	S	M	L
Ring Size (Reg)	6,6,7	7,8,8	8,9,9
Ring Size (Midi)	4,5,4	4,5,4	5,6,5

Size	XS	S	M	L	XL
Ring Size	9	10	11	12	13
Diameter (mm)	19 mm	20 mm	21 mm	22 mm	23 mm

Size	S	M	L	XL
Chest	53.5 cm / 21.1”	57.5 cm / 22.6”	61.5 cm / 24.2”	65.5 cm / 25.8”
Length	68.5 cm / 27”	72.5 cm / 28.5”	76.5 cm / 30.1”	80.5 cm / 31.7”
Sleeve	56 cm / 22”	58 cm / 22.8”	60 cm / 23.6”	62 cm / 24.4”

Size	XS	S	M	L	XL
US	2	4/6	8/10	12/14	16/18
EUR	32	34/36	38/40	42/44	46-48
UK	6	8/10	12/15	16/18	20/22
Natural waist	21”	23”	25”	27”	29”
Hips	29.5”	30.5”	31.5”	32.5”	33.5”
Inseam	25”	25.5”	26”	26.5”	27”

Size	S / M	M / L
Inches	31” - 34”	34” - 37”
CMs	77.5 cm - 85 cm	85 cm - 92.5 cm

Size	S	M	L	XL	XXL
Inches	28”	30”	32”	34”	36”
CMs	70 cm	75 cm	80 cm	85 cm	90 cm

Size	S	M	L	XL	XXL
Inches	31”	33”	35”	37”	39”
CMs	77.5 cm	82.5 cm	87.5 cm	92.5 cm	97.5 cm

Size	XS	S	M	L	XL	XXL
Inches	32”	34”	36”	38”	40”	42”
CMs	80 cm	85 cm	90 cm	95 cm	100 cm	105 cm

Size	S / M	M / L
Head Circumference ( Inches )	22”	22.8”
Head Circumference ( CMs )	56 cm	58 cm

Size	S / M	M / L
Head Circumference ( Inches )	22.8”	23.6”
Head Circumference ( CMs )	58 cm	60 cm

Published July 15, 2025

When it comes to the Sperry Authentic Original™ Boat Shoe and other Sperry boat shoes, they should feel like they were made for you. With over 80 years of craftsmanship, we’ve perfected the true-to-you fit. Here are some tips for how Sperry boat shoes should fit and finding your size.

Sperry leather boat shoes
0197640_000

Wear your Sperry leather boat shoes often to break them in. The hand-sewn leather moccasin construction will mold to your foot over time. Plus, our Authentic Original Boat Shoe has 360° lacing, so you can tighten up when you’re on the go and loosen up for a laid-back weekend.

Size your shoes up, or down?
Leather will stretch over time. If you’re buying Sperry leather shoes, consider buying a half size down from your regular size. If the shoes are made of synthetic materials, get your normal size. Synthetic materials won’t stretch; they’re constructed to hold their shape (i.e., size). Keep in mind, breaking in your new leather boat shoes will only affect the width (not the length). Need extra width? Or are your feet narrow Shop our shoes in Extended Widths—wide, extra wide, and slim.

How do you wear your boat shoes? Socks or no socks?
socks

The sock vs. no-sock debate continues. No-show socks are the perfect answer to the debate. Wearing no-show socks with your Sperry boat shoes helps with odor protection and added comfort. If you’re going to rock a sock, plan for a little extra room.

When to shop for new shoes?
When shopping, consider trying on Sperry boat shoes toward the end of the day. During the day, gravity will bring fluid to your feet causing a bit of swelling. The footbed will compress over time, providing a little extra wiggle room.

If you’re still not sure you have the right size? The Sperry customer service team is always here to help answer your sizing and other questions.

Want to find out more about Sperry shoes?
Check out other “how-to” blogs about Sperry shoes. And there’s more! Here’s the complete collection of informative and inspiring Sperry blogs.

Ready to shop?
Find the complete Sperry collection for men, women, and kids.

For Her: The Lounge Away Sneaker

The long weekend doesn't start with a plan. It starts with a feeling — light jacket, linen shorts, nowhere to be until you decide to be there. The Lounge Away is the shoe that moves with that energy. Canvas upper, effortless fit, and five colors that take you from a Saturday morning coffee to a Friday night rooftop without asking anything in return. Pick your color. The rest takes care of itself.