Welcome to the Syna World Size Guide – your go-to reference to help you find the perfect fit for every item. Whether you're shopping for hoodies, t-shirts, tracksuits, joggers, and Sneakers we want to ensure your purchase fits just right.
🧥 Tops – Hoodies, Sweatshirts, T-Shirts and Jackets
| Size | Chest (inches) | Chest (cm) | UK Size | EU Size |
|---|---|---|---|---|
| XS | 32–34 | 81–86 | 6–8 | 36 |
| S | 35–37 | 89–94 | 8–10 | 38 |
| M | 38–40 | 97–102 | 10–12 | 40–42 |
| L | 41–43 | 104–109 | 14–16 | 44–46 |
| XL | 44–46 | 112–117 | 16–18 | 48 |
| XXL | 47–49 | 119–124 | 18–20 | 50–52 |
👖 Bottoms – Joggers, Tracksuit Pants
| Size | Waist (inches) | Waist (cm) | Inside Leg (inches) |
|---|---|---|---|
| XS | 26–28 | 66–71 | 29 |
| S | 28–30 | 71–76 | 30 |
| M | 30–32 | 76–81 | 31 |
| L | 33–35 | 84–89 | 32 |
| XL | 36–38 | 91–97 | 32 |
| XXL | 39–41 | 99–104 | 33 |
📏 How to Measure
To ensure the best fit, measure yourself using a soft measuring tape. If you don’t have one, you can use a piece of string and a ruler.
👕 Chest
Wrap the tape measure under your arms at the fullest part of your chest. Keep the tape flat and level.
👖 Waist
Measure around the narrowest part of your waist, just above the hips.
🦵 Inside Leg
Measure from the top of your inner thigh to the bottom of your ankle.
🧍♂️ Fit Guide
Regular Fit – True to size with a relaxed, everyday fit.
Oversized Fit – Roomier in the body and sleeves for a street-style look.
Slim Fit – Tapered cut, closer to the body.
If you prefer a looser fit, we recommend sizing up for comfort and styling.
🌍 International Size Conversion
| UK | US | EU | Japan |
|---|---|---|---|
| XS | XS | 36 | S |
| S | S | 38 | M |
| M | M | 40–42 | L |
| L | L | 44 | XL |
| XL | XL | 46 | XXL |
| XXL | XXL | 48 | 3XL |
👟 Sneaker Size Guide
To help you find the perfect fit, please refer to the size conversion chart below. All sizes listed on syna-world.co.uk are UK sizes unless otherwise stated.
| UK Size | US Men | US Women | EU Size | Foot Length (cm) |
|---|---|---|---|---|
| 5 | 6 | 7.5 | 38 | 24 cm |
| 6 | 7 | 8.5 | 39 | 24.5 cm |
| 7 | 8 | 9.5 | 41 | 25.5 cm |
| 8 | 9 | 10.5 | 42.5 | 26.5 cm |
| 9 | 10 | 11.5 | 44 | 27 cm |
| 10 | 11 | 12.5 | 45 | 28 cm |
| 11 | 12 | 13.5 | 46 | 29 cm |
| 12 | 13 | 14.5 | 47.5 | 30 cm |
🧠 Sizing Tips:
Nike sneakers generally run true to size, but if you're between sizes or prefer a looser fit, consider going half a size up.
Measure your foot length from heel to toe and compare it with the chart for the most accurate fit.
If you plan to wear thick socks, you may want a slightly larger size.
❓ Need Help?
If you’re unsure about which size to choose, our customer service team is here to help.
📧 Email: [email protected]
📦 Returns & Exchanges: We accept returns within 14 days – View Return Policy
Syna World is all about comfort, quality, and confidence. This guide is designed to help you find your perfect fit – because when you feel good, you look even better.