Size Guides
Our custom SI cuts and fits are designed for the Indian body. They follow the general India sizing guide with slight tweaks for a better and a more custom fit, they are a slightly cropped than the standard unisex t-shirts with relatively longer sleeves.
Steps to find your right size:
1. Start by choosing a t-shirt from your wardrobe whose fit you love
2. Measure and note the shoulders from hem to hem and then the chest width on one side and multiply that by 2
3. Refer to our size chart to match your measurements to select the size that best aligns with your garments dimensions.
Rash Guard size chart:
| Size (inch) |
Length (inch) |
Chest (inch) |
Sleeve Length (inch) |
| XS |
24 |
36 |
27 |
| S |
25 |
38 |
28 |
| M |
26 |
40 |
29 |
| L |
27 |
42 |
30 |
| XL |
28 |
44 |
31 |
| Size (cm) |
Length (cm) |
Chest (cm) |
Sleeve Length (cm) |
| XS |
61 |
91.5 |
68.5 |
| S |
63.5 |
96.5 |
71 |
| M |
66 |
101.5 |
73.5 |
| L |
68.5 |
106.5 |
76 |
| XL |
71 |
112 |
78.5 |
Surface Interval oversized fit guide (garment size):
| Size (inch) |
Shoulder (inch) |
Sleeves (inch) |
Chest (inch) |
Length (inch) |
| S |
19 |
10.5 |
42 |
26.5 |
| M |
20 |
11.5 |
44 |
27.5 |
| L |
21 |
12.5 |
46 |
28.5 |
| XL |
22 |
13.5 |
48 |
30 |
| Size (cm) |
Shoulder (cm) |
Sleeves (cm) |
Chest (cm) |
Length (cm) |
| S |
48.3 |
26.7 |
106.7 |
67.3 |
| M |
50.8 |
29.2 |
111.8 |
69.9 |
| L |
53.3 |
31.8 |
116.8 |
72.4 |
| XL |
55.9 |
34.3 |
121.9 |
76.2 |
Regular fit size chart:
| Size (inch) |
Shoulder (inch) |
Chest (inch) |
Length (inch) |
Sleeve (inch) |
| XS |
14 |
34 |
25 |
7.5 |
| S |
16 |
36 |
26 |
8 |
| M |
17.5 |
39 |
27 |
8.5 |
| L |
19 |
42 |
28 |
9 |
| XL |
20.5 |
44 |
29 |
9.5 |
| Size (cm) |
Shoulder (cm) |
Chest (cm) |
Length (cm) |
Sleeve (cm) |
| XS |
35.6 |
86.4 |
63.5 |
19.1 |
| S |
40.6 |
91.4 |
66 |
20.3 |
| M |
44.5 |
99.1 |
68.6 |
21.6 |
| L |
48.3 |
106.7 |
71.1 |
22.9 |
| XL |
52.1 |
111.8 |
73.7 |
24.1 |
Tank top size chart:
| Size (inch) |
Chest (inch) |
Length (inch) |
| XS |
36 |
25.5 |
| S |
38 |
26 |
| M |
40 |
27.5 |
| L |
42 |
28 |
| XL |
44 |
29 |
| Size (cm) |
Chest (cm) |
Length (cm) |
| XS |
91.4 |
64.8 |
| S |
96.5 |
66 |
| M |
101.6 |
69.9 |
| L |
106.7 |
71.1 |
| XL |
111.8 |
73.7 |
SI Basic Tee size chart:
| Size (inch) |
Chest (inch) |
Length (inch) |
| S |
42 |
28 |
| M |
44 |
29 |
| L |
46 |
30 |
| XL |
48 |
31 |
| Size (cm) |
Chest (cm) |
Length (cm) |
| S |
106.7 |
71.1 |
| M |
111.8 |
73.7 |
| L |
116.8 |
76.2 |
| XL |
121.9 |
78.7 |
Please note:
• If you prefer a looser fit, please go a size up
• The above sizes may vary to the slightest from the chart to the actual product
• All products may shrink after wash
![SI Basics - The Night Dive [Limited Edition]](http://surface-interval.com/cdn/shop/files/SI_Basics_-_The_Night_Dive_Limited_Edition.jpg?v=1760867950&width=1400)
![SI Basics - The Night Dive [Limited Edition]](http://surface-interval.com/cdn/shop/files/SI_Basics_-_The_Night_Dive_Limited_Edition_2.jpg?v=1760867960&width=1400)
![SI Basics - The Night Dive [Limited Edition]](http://surface-interval.com/cdn/shop/files/SI_Basics_-_The_Night_Dive_Limited_Edition.jpg?v=1760867950&width=1200)
![SI Basics - The Night Dive [Limited Edition]](http://surface-interval.com/cdn/shop/files/SI_Basics_-_The_Night_Dive_Limited_Edition_2.jpg?v=1760867960&width=1200)
