Size Guide

All Algoritmo garments are unisex fit. The measurements below are taken from the garment laid flat (not the body) and follow standard US sizing, with an approximate margin of ±2 cm. Pick the section that matches the type of garment you're about to buy.

</> How to measure yourself before hitting buy

3 measurements, 2 minutes, zero returns.

1. Chest width: using a garment that already fits you well, laid flat, measure armpit to armpit and multiply by 2 (or measure the chest circumference directly with a tape measure, passing under the arms).

2. Length: from the highest point of the shoulder to the bottom hem, with the garment laid flat.

3. Sleeve (if applicable): from the center of the neck to the cuff, with the arm relaxed.

Terminal tip: measure on a garment you already know fits well — not directly on your body — so the result compiles without errors. If your measurement falls right between two sizes, go with the larger one if you like a looser fit, or use the "Not sure of your size? Find it in 15 sec" widget further down on each product page.

International size equivalence

Our sizing runs in standard US. Here's how it translates to other systems.

US (Algoritmo)	EU	UK	MX/LATAM
S	44/46	8/10	Ch
M	48/50	12/14	M
L	52/54	16/18	G
XL	56/58	20/22	XG
2XL	60/62	24/26	2XG
3XL	64/66	28/30	3XG
4XL	68/70	32/34	4XG

Sizes are standard US — always check this guide before buying, since US sizing runs differently than European or Latin American sizing. When in doubt, measure yourself and compare against the table for your garment type below.

Size Guide · T-Shirt

Unisex fit.

Size	Width cm / in	Length cm / in
S	46 / 18"	71 / 28"
M	51 / 20"	74 / 29"
L	56 / 22"	76 / 30"
XL	61 / 24"	79 / 31"
2XL	66 / 26"	81 / 32"
3XL	71 / 28"	84 / 33"
4XL	76 / 30"	86 / 34"

Width: armpit to armpit with the garment laid flat. Length: from the highest shoulder point to the bottom hem.

Standard US sizing. Approximate values ±2 cm. Measure on a garment that fits you well and compare.

Size Guide · Oversize

Unisex fit.

Size	Width cm / in	Length cm / in
S	53 / 21"	72 / 28"
M	56 / 22"	74 / 29"
L	59 / 23"	76 / 30"
XL	62 / 24"	78 / 31"
2XL	65 / 26"	80 / 31"

Width: armpit to armpit with the garment laid flat. Length: from the highest shoulder point to the bottom hem.

Standard US sizing. Approximate values ±2 cm. Measure on a garment that fits you well and compare.

Size Guide · Sleeveless

Unisex fit.

Size	Width cm / in	Length cm / in
S	42 / 17"	69 / 27"
M	46 / 18"	71 / 28"
L	51 / 20"	74 / 29"
XL	56 / 22"	76 / 30"
2XL	61 / 24"	79 / 31"
3XL	66 / 26"	81 / 32"

Width: armpit to armpit with the garment laid flat. Length: from the highest shoulder point to the bottom hem.

Standard US sizing. Approximate values ±2 cm. Measure on a garment that fits you well and compare.

Size Guide · Long Sleeve

Unisex fit.

Size	Width cm / in	Length cm / in	Sleeve cm / in
S	46 / 18"	69 / 27"	84 / 33"
M	51 / 20"	71 / 28"	86 / 34"
L	56 / 22"	74 / 29"	87 / 34"
XL	61 / 24"	76 / 30"	89 / 35"
2XL	66 / 26"	79 / 31"	90 / 35"
3XL	71 / 28"	81 / 32"	92 / 36"

Width: armpit to armpit with the garment laid flat. Length: from the highest shoulder point to the bottom hem. Sleeve: from the center of the neck to the cuff.

Standard US sizing. Approximate values ±2 cm. Measure on a garment that fits you well and compare.

Size Guide · Sweater

Unisex fit.

Size	Width cm / in	Length cm / in
S	51 / 20"	69 / 27"
M	56 / 22"	71 / 28"
L	61 / 24"	74 / 29"
XL	66 / 26"	76 / 30"
2XL	71 / 28"	79 / 31"
3XL	76 / 30"	81 / 32"

Width: armpit to armpit with the garment laid flat. Length: from the highest shoulder point to the bottom hem.

Standard US sizing. Approximate values ±2 cm. Measure on a garment that fits you well and compare.

Size Guide · Hoodie

Unisex fit.

Size	Width cm / in	Length cm / in
S	51 / 20"	69 / 27"
M	56 / 22"	71 / 28"
L	61 / 24"	74 / 29"
XL	66 / 26"	76 / 30"
2XL	71 / 28"	79 / 31"
3XL	76 / 30"	84 / 33"

Width: armpit to armpit with the garment laid flat. Length: from the highest shoulder point to the bottom hem.

Standard US sizing. Approximate values ±2 cm. Measure on a garment that fits you well and compare.

Size Guide · V-Neck

Unisex fit.

Size	Width cm / in	Length cm / in
S	46 / 18"	71 / 28"
M	51 / 20"	74 / 29"
L	56 / 22"	76 / 30"
XL	61 / 24"	79 / 31"
2XL	66 / 26"	81 / 32"

Width: armpit to armpit with the garment laid flat. Length: from the highest shoulder point to the bottom hem.

Standard US sizing. Approximate values ±2 cm. Measure on a garment that fits you well and compare.

Size Guide · Cap

Unisex fit.

Size	Head circumference cm / in
One size	54–60

Standard US sizing. Approximate values ±2 cm. Measure on a garment that fits you well and compare.

Size Guide · Shorts

Unisex fit.

Size	Waist cm / in	Length cm / in
S	38 / 15"	43 / 17"
M	40 / 16"	45 / 18"
L	43 / 17"	47 / 19"
XL	45 / 18"	49 / 19"
2XL	48 / 19"	51 / 20"

Waist: laid flat, side to side. Length: from the highest shoulder point to the bottom hem.

Standard US sizing. Approximate values ±2 cm. Measure on a garment that fits you well and compare.

Size Guide · Oversize Hoodie

Unisex fit.

Size	Width cm / in	Length cm / in
S	56 / 22"	70 / 28"
M	59 / 23"	72 / 28"
L	62 / 24"	74 / 29"
XL	65 / 26"	76 / 30"
2XL	68 / 27"	80 / 31"
3XL	71 / 28"	82 / 32"

Width: armpit to armpit with the garment laid flat. Length: from the highest shoulder point to the bottom hem.

Standard US sizing. Approximate values ±2 cm. Measure on a garment that fits you well and compare.

Size Guide · Zip-Up Hoodie

Unisex fit.

Size	Width cm / in	Length cm / in
S	51 / 20"	69 / 27"
M	56 / 22"	71 / 28"
L	61 / 24"	74 / 29"
XL	66 / 26"	76 / 30"
2XL	71 / 28"	79 / 31"
3XL	76 / 30"	84 / 33"

Width: armpit to armpit with the garment laid flat. Length: from the highest shoulder point to the bottom hem.

Standard US sizing. Approximate values ±2 cm. Measure on a garment that fits you well and compare.

Size Guide · Oversize Sweatshirt

Unisex fit.

Size	Width cm / in	Length cm / in
S	56 / 22"	70 / 28"
M	59 / 23"	72 / 28"
L	62 / 24"	74 / 29"
XL	65 / 26"	76 / 30"
2XL	68 / 27"	78 / 31"

Width: armpit to armpit with the garment laid flat. Length: from the highest shoulder point to the bottom hem.

Standard US sizing. Approximate values ±2 cm. Measure on a garment that fits you well and compare.

Size Guide · Polo

Unisex fit.

Size	Width cm / in	Length cm / in
S	47 / 19"	71 / 28"
M	52 / 20"	73 / 29"
L	57 / 22"	75 / 30"
XL	62 / 24"	77 / 30"
2XL	67 / 26"	79 / 31"

Width: armpit to armpit with the garment laid flat. Length: from the highest shoulder point to the bottom hem.

Standard US sizing. Approximate values ±2 cm. Measure on a garment that fits you well and compare.