Size Guide
At THIRTY3, fit matters. Whether you’re training hard or recovering in comfort, we want you to feel confident in every piece you wear.
All of our products have detailed size charts on each product page, but we’ve added this size guide here as a quick reference to help you find your perfect fit.
How to Measure
For the most accurate fit, measure yourself with a soft tape measure and compare your measurements to the guide below.

1 Length
Measure from where the shoulder seam meets the collar to the hem.
2 Shoulder
Measure from where the shoulder seam meets the sleeve on one side to another side.
3 Chest
Measure from the stitches below the armpits on one side to another.
4 Sleeve length
Measure from where the shoulder seam meets armhole to the cuff.
| Size | Length (cm) | Shoulder (cm) | Chest (cm) | Sleeve Length (cm) |
|---|---|---|---|---|
| S | 70 | 65 | 66 | 53.5 |
| M | 72 | 67 | 68 | 54.5 |
| L | 74 | 69 | 70 | 55.5 |
| XL | 76 | 71 | 72 | 56.5 |
| 2XL | 78 | 73 | 74 | 57.5 |
Need Help Choosing a Size?
Between sizes?
We recommend sizing up for a more relaxed fit, or down for a more snug, supportive feel, depending on your personal style.
Prefer oversized or fitted?
Many of our products are designed with either a relaxed or athletic cut. Check the product description for specific fit notes.
Still unsure?
Reach out to us at hello@thirtythreeclothing.com. We’re happy to help you find the right size.
Washing and Care
Please note that all garments are made with high-quality materials. Follow the care instructions on the label to avoid shrinkage or fabric warping.
Reminder
THIRTY3 hoodies are made to order, so we recommend checking your size carefully before purchasing. This helps reduce waste, returns, and ensures a better fit from day one.