Square Root Of 169 13 Years Old Official Teenager Birthday T-shirt
🎁 Buy 3+ items → 10% off your order, auto-applied at cart.
Garment
📏 Size guide & fit — Unisex Standard T-Shirt
| Size | Length (in) | Width (in) |
|---|---|---|
| S | 28 | 18 |
| M | 29 | 20 |
| L | 30 | 22 |
| XL | 31 | 24 |
| 2XL | 32 | 26 |
| 3XL | 33 | 28 |
| 4XL | 34 | 30 |
| 5XL | 35 | 32 |
Measurements are garment dimensions in inches. Between sizes? Size up for a relaxed look.
Print side
Size
Color:
Quantity
1
$21.99
Unisex Standard T-Shirt · size? · color? · Qty 1
⏱
Made to order · 2–4 daysfast turnaround
🚚
Free US shippingUS orders over $50.00
↩
7-day returns+ 1 free size exchange
🔒
Secure checkoutPayPal · price server-side
🎁 Bundle & save — buy any 3 items and 10% off is applied automatically, no code needed.
Celebrate the transition into teenage years with this engaging Square Root of 169 T-shirt, an ideal choice for turning 13. The design cleverly highlights the math reference, making it perfect for young math fans excited about their birthday. Suitable for gatherings with friends, school celebrations, or casual wear, this shirt captures their milestone moment while acknowledging their interests. As they proudly wear it, they can enjoy the humor and uniqueness that comes with reaching this new age. It’s a joyful way to mark a significant birthday and showcase personality.
Product details
- Fabric
- 100% ring-spun cotton (heather colors are a cotton–polyester blend); midweight 4.2–5.3 oz, pre-shrunk.
- Print placement
- Front, Back, Front + Back
- Garment options
- 13 styles — unisex & women's tees, hoodies, sweatshirts, tanks, long-sleeve, and kids
- Available sizes
- S–5XL (range varies by garment)
- Made to order
- Each item is printed after you order — nothing sits in a warehouse, so we cut needless waste.
- Care
- Machine wash cold inside-out, tumble dry low, and avoid ironing directly on the print.
Reviews
No reviews yet — verified buyers can review after their order ships.