Size Guide
We stock a wide range of brands, and almost all of them follow standard UK sizing. The chart below is a reliable general guide that applies to roughly 99% of the products on our store. If a specific item runs differently, that will be noted on the product page itself.
How to use this guide
Measure yourself with a soft tape and match your measurements to the closest size below. If you fall between two sizes, we'd recommend sizing up for a relaxed fit or sticking to the smaller size for a closer fit.
Men's Size Chart
| Size | Chest (inches) | Chest (cm) | Waist (inches) | Waist (cm) |
|---|---|---|---|---|
| XS | 34–36 | 86–91 | 28 | 71 |
| S | 36–38 | 91–96 | 30 | 76 |
| M | 38–40 | 96–101 | 32 | 81 |
| L | 40–42 | 101–106 | 34 | 86 |
| XL | 42–44 | 106–112 | 36 | 91 |
| XXL | 44–46 | 112–117 | 38 | 96 |
How to Measure
Chest
Measure around the fullest part of your chest, keeping the tape under your arms and level across your back. Keep the tape snug but not tight.
Waist
Measure around your natural waistline, roughly level with your belly button. Keep the tape comfortably loose rather than pulled in.
Fit & Brand Notes
- The vast majority of our brands follow standard UK sizing, so the chart above will apply to almost everything you order.
- A small number of styles are designed with a slim, oversized or relaxed fit. Where this is the case, it will be mentioned in the product description.
- Measurements are intended as a general guide. Individual fit can vary slightly between brands and garment types.
- If you're caught between two sizes, size up for a more relaxed fit or down for a closer fit.
Still Unsure?
If you're not certain which size is right for you, get in touch before ordering and we'll be happy to help:
help@authentic-ireland.ie
If something doesn't fit once it arrives, you can request a return in line with our Returns Policy.