The OSS BJJ T Shirt celebrates the spirit of respect and unity that defines Brazilian Jiu Jitsu. With its clean, modern font boldly displaying the word “OSS,” this minimalist design speaks volumes to practitioners who live by the code—discipline, humility, and perseverance. Made from 100% organic combed ring-spun cotton, it combines durability with a premium, soft feel for all-day comfort. Whether you’re training, teaching, or just repping your lifestyle, the OSS BJJ T Shirt is a timeless essential for every Jiu Jitsu enthusiast.
• 100% organic combed ring-spun cotton
• Fabric weight: 5.3 oz./yd.² (180 g/m²)
• Regular fit
• Set-in sleeves
• 1 × 1 rib at collar
• Double-needle topstitch on the sleeves and bottom hems
• Self-fabric neck tape on the inside of the back
• The fabric of this product holds certifications for its organic cotton content under GOTS (Global Organic Textile Standard) and OCS (Organic Content Standard)
Age restrictions: For adults
EU Warranty: 2 years
In compliance with the General Product Safety Regulation (GPSR),
Oak inc. and
SINDEN VENTURES LIMITED ensure that all consumer products offered are safe and meet EU standards. For any product safety related inquiries or concerns, please contact our EU representative at
gpsr@sindenventures.com. You can also write to us at
123 Main Street, Anytown, Country or
Markou Evgenikou 11, Mesa Geitonia, 4002, Limassol, Cyprus.Size guide
| |
LENGTH (inches) |
CHEST (inches) |
SLEEVE LENGTH (inches) |
| S |
28 ⅜ |
31-34 |
9 ¼ |
| M |
29 ⅛ |
35-38 |
9 ½ |
| L |
29 ⅞ |
39-41 |
9 ⅝ |
| XL |
31 ⅛ |
42-45 |
9 ⅞ |
| 2XL |
32 ⅛ |
46-48 |
10 |
| 3XL |
33 ⅛ |
49-51 |
10 ¼ |
| 4XL |
33 ⅞ |
52-54 |
10 ¼ |
| 5XL |
34 ⅝ |
55-57 |
10 ¼ |
| |
LENGTH (cm) |
CHEST (cm) |
SLEEVE LENGTH (cm) |
| S |
72 |
78.7-86.4 |
23.5 |
| M |
74 |
89-96.5 |
24 |
| L |
76 |
99-104.1 |
24.5 |
| XL |
79 |
106.7-114.3 |
25 |
| 2XL |
81.5 |
116.8-122 |
25.5 |
| 3XL |
84 |
124.5-129.5 |
26 |
| 4XL |
86 |
132-137.2 |
26 |
| 5XL |
88 |
139.7-144.8 |
26 |
