Shopping Security
• Safe Payments
Checkout on ShirtBoom is encrypted end-to-end and processed through Shopify Payments, a Level 1 PCI Service Provider — the highest level of payment security certification available. Your card number, expiration date, and CVC are never seen, stored, or transmitted by ShirtBoom.
Accepted payment methods
Learn more about payment methods
• Secure Logistics
1. Real-time order tracking. Once your order ships, you'll receive an email with a tracking number. Follow your package end-to-end at Track Your Order.
2. Package protection. If your package is lost, damaged, or stolen in transit, we'll resend the item or issue a full refund — no questions, no return required. Just contact us within 30 days of the ship date.
3. Discreet packaging. Orders ship in plain mailers without product images or pricing on the outside.
• Customer Service
• Privacy Protection
ShirtBoom respects your privacy and is committed to protecting your personal data. We use industry-standard physical, technical, and administrative safeguards to keep your information secure, and we never sell or rent it to third parties. You can request access, correction, or deletion of your data at any time.
Size Guide
Relaxed Hawaiian fit. This shirt is designed with extra room through the chest and body.
- Choose your usual size for a classic relaxed vacation fit.
- If you are between sizes or prefer a cleaner fit, we recommend sizing down.
- If you have broad shoulders, a larger chest, or prefer extra room, choose your usual size.
Measurements are garment measurements, not body measurements.
Fit Feedback
Real measurements from real ShirtBoom customers — use this to gauge how our sizes wear on different body types.
| Customer | Chest | Waist | Weight | Height | Suggested Size | Expected Fit |
|---|---|---|---|---|---|---|
| Tyler G** | 104cm / 41″ | 91cm / 36″ | 81.6kg / 180lb | 173cm / 5′8 | M | Great / Relaxed |
| Marcus C** | 99cm / 39″ | 71cm / 28″ | 72.5kg / 160lb | 175cm / 5′9 | XS | Clean Fit |
| Daniel P** | 104cm / 41″ | 84cm / 33″ | 72.5kg / 160lb | 178cm / 5′10 | S | Great / Clean Relaxed |
| Jordan W** | 99cm / 39″ | 104cm / 41″ | 80kg / 176lb | 163cm / 5′4 | L | Loose |
| Eric S** | 110cm / 43.3″ | 100cm / 39.3″ | 85kg / 187lb | 173cm / 5′8 | XL | Loose |
Size Chart
| Size | Chest | Shoulder Width | Bottom Opening | Shirt Length | Sleeve Length |
|---|---|---|---|---|---|
| XS | 43″ | 17.8″ | 41″ | 29″ | 9.2″ |
| S | 45.5″ | 18.5″ | 43.5″ | 29.5″ | 9.5″ |
| M | 48″ | 19.0″ | 46″ | 30″ | 9.8″ |
| L | 50.5″ | 19.8″ | 48.5″ | 31″ | 10.2″ |
| XL | 53.5″ | 20.8″ | 51.5″ | 32″ | 10.5″ |
| 2XL | 56″ | 21.8″ | 54″ | 33″ | 10.9″ |
| 3XL | 59″ | 22.8″ | 57″ | 34″ | 11.3″ |
| 4XL | 62″ | 23.8″ | 60″ | 35″ | 11.6″ |
| 5XL | 65″ | 24.5″ | 63″ | 36″ | 11.9″ |
| Size | Chest | Shoulder Width | Bottom Opening | Shirt Length | Sleeve Length |
|---|---|---|---|---|---|
| XS | 109 | 45 | 104 | 74 | 23 |
| S | 116 | 47 | 110 | 75 | 24 |
| M | 122 | 48 | 117 | 76 | 25 |
| L | 128 | 50 | 123 | 79 | 26 |
| XL | 136 | 53 | 131 | 81 | 27 |
| 2XL | 142 | 55 | 137 | 84 | 28 |
| 3XL | 150 | 58 | 145 | 86 | 29 |
| 4XL | 157 | 60 | 152 | 89 | 29 |
| 5XL | 165 | 62 | 160 | 91 | 30 |
How to Measure
1. Chest
Measure the full circumference around the chest at the fullest part, just under the arms — keep the tape level all the way around.
2. Shoulder Width
Measure straight across the back, from one shoulder seam to the other shoulder seam.
3. Bottom Opening
Measure the full circumference around the bottom hem opening of the shirt — all the way around, not just edge to edge.
4. Shirt Length
Measure from the highest point of the shoulder seam straight down to the bottom hem.
5. Sleeve Length
Measure from the shoulder seam down the outside of the sleeve to the cuff edge.
