Celebrate in style — with softness, sustainability, and squeal-worthy charm.
The Guinea Pig Happy Birthday T-Shirt by Anke Wonder features two adorable party-ready guinea pigs wearing festive hats, surrounded by balloons and a birthday cake. Paired with the cheerful “Happy Birthday” message, this tee is perfect for birthdays, gifting, or simply spreading joy wherever you go.
Made from 100% certified organic cotton, it’s soft, breathable, and PETA‑Approved Vegan — ideal for eco-conscious women who love playful fashion and animal-inspired designs. Available in White, Beige, and Peach, this tee adds a pop of celebration to any outfit and makes a thoughtful gift for guinea pig lovers and birthday queens alike.
DETAILS & CARE
Fabric: ⭐ 100% organic cotton (GOTS, OCS, OEKO-TEX, PETA-Approved Vegan)
Fit: Classic medium fit in soft single jersey knit for everyday comfort
Eco-friendly & sustainable: Made-to-order using certified organic cotton to reduce waste
Care: Machine wash cold, gentle cycle
📏 Sizing Tip
These tees run slightly smaller for US customers — we recommend ordering one size up for the perfect fit.
Size guide
| BODY LENGTH (inches) | CHEST WIDTH (inches) | SLEEVE LENGTH (inches) | |
| S | 27 ⅛ | 19 ½ | 8 ⅞ |
| M | 28 ¾ | 21 | 9 ½ |
| L | 29 ½ | 22 ¼ | 9 ⅝ |
| XL | 30 ¼ | 23 ⅜ | 9 ⅞ |
| 2XL | 31 ⅛ | 25.00 | 10 |
| 3XL | 31 ⅞ | 26 ⅝ | 10 ¼ |
| BODY LENGTH (cm) | CHEST WIDTH (cm) | SLEEVE LENGTH (cm) | |
| S | 69 | 49.5 | 22.5 |
| M | 73 | 53.5 | 24 |
| L | 75 | 56.5 | 24.5 |
| XL | 77 | 59.5 | 25 |
| 2XL | 79 | 63.5 | 25.5 |
| 3XL | 81 | 67.5 | 26 |