Cool 13th Birthday T-Shirt for Boys and Girls Fun Teenager Sign Design
Cool 13th Birthday T-Shirt for Boys and Girls Fun Teenager Sign Design
Find your perfect fit – all sizes are US standard unisex measurements.
📏 T-Shirt Measurements (in inches)
| Size | Chest Width | Body Length | Sleeve Length |
|---|---|---|---|
| XS | 16.5” | 27” | 8” |
| S | 18” | 28” | 8.25” |
| M | 20” | 29” | 8.5” |
| L | 22” | 30” | 9” |
| XL | 24” | 31” | 9.25” |
| 2XL | 26” | 32” | 9.5” |
| 3XL | 28” | 33” | 9.75” |
📝 How to Measure
- Chest Width: Lay your favorite tee flat. Measure 1" below armpit, across chest from seam to seam.
- Body Length: Measure from the highest point of shoulder to bottom hem.
- Sleeve Length: Measure from shoulder seam to end of sleeve.
💡 Sizing Tips
- All shirts are unisex – for a more fitted look, size down; for oversized style, size up.
- If you’re between two sizes, we recommend choosing the larger one for comfort.
- Our tees are pre-shrunk but may shrink up to 5% after first wash.
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Product Detail
Product Detail
Our tees are crafted with premium 100% cotton (180–200gsm), designed to be soft, breathable, and durable.
Every print is created using eco-friendly, high-definition inks that stay vibrant wash after wash.
- Unisex fit (true to US size)
- Pre-shrunk for minimal shrinkage
- Ethically produced & shipped worldwide
🎉 **Celebrate the Big 1-3 in Style!** 🎉
Make their 13th birthday unforgettable with our **"It's My 13th Birthday" T-Shirt**! Perfect for boys and girls entering their teenage years, this fun and vibrant tee is a must-have for any birthday celebration.
👕 **Product Highlights:**
- **Design:** The shirt features an eye-catching, bold graphic that proudly announces 'It's My 13th Birthday!' in playful, colorful lettering. The design is both festive and stylish, making it the perfect addition to any birthday outfit!
- **Color:** Available in a classic black hue, the bright graphic pops against the backdrop, ensuring your birthday star stands out in any crowd.
- **Material:** Crafted from high-quality, breathable cotton, this t-shirt is soft, comfortable, and made for all-day wear. Your teen will love wearing this tee during their birthday celebrations and long after!
- **Fit:** Designed with a modern cut, it provides a flattering fit for both boys and girls. Check our size chart to find the perfect fit for your teen!
🎈 **Perfect for Every Celebration:**
Whether they’re throwing a party, going out with friends, or having a family gathering, this t-shirt is the ideal choice to mark this special milestone in their life.
🛍️ **Why Choose Our T-Shirt?**
- Makes a fantastic birthday gift!
- Great for photos - capture the moment with a stylish and fun design.
- Easy to care for – machine washable and durable for everyday wear.
✨ Don’t miss out on the chance to make their 13th birthday extra special! Get your **"It's My 13th Birthday" T-Shirt** today and let the celebrations begin! 🌟
How to wear & care
How to wear & care
Perfect for daily wear, streetwear outfits, parties, or casual hangouts.
Pair it with jeans, shorts, or layer it with a jacket for an effortless look.
To keep your tee looking fresh:
- Machine wash cold, inside-out
- Use mild detergent (no bleach)
- Tumble dry low or hang dry
- Do not iron directly on the print
Materials & Craftsmanship
Materials & Craftsmanship
Fabric: 100% ring-spun cotton (soft-touch, breathable, durable)
Print: DTG eco-friendly inks (non-toxic, safe for skin, long-lasting colors)
Fit: Unisex, US standard sizing (check our [Size Guide])
Origin: Designed in-house by Bacoza, produced with trusted partners to ensure quality
Guarantee: 30-day return policy + responsive customer support
Premium Comfort
Soft cotton tees you’ll want to wear every day.
Meaningful Designs
From pets to art to humor, find a tee that tells your story.
Perfect for Gifting
Thoughtful, unique, and sure to bring a smile.
Trusted Worldwide
Thousands of orders shipped with care.
Questions check here
What material are the tees made from?
What material are the tees made from?
→ Our tees are printed on authentic Gildan blanks (5000 & 6400) — soft, durable cotton with eco-friendly inks that keep colors vibrant.
How do I find my right size?
How do I find my right size?
All shirts follow US unisex sizing. For a tighter fit, size down; for an oversized look, size up. See our [Size Guide] for details.
How long does shipping take?
How long does shipping take?
→ US orders usually arrive in 4–7 business days. International orders take 7–14 business days depending on location.
Do you ship internationally?
Do you ship internationally?
→ Yes, we ship worldwide. A tracking link is always provided so you can follow your order.
What if my shirt doesn’t fit?
What if my shirt doesn’t fit?
→ You can exchange unworn items within 30 days. Just contact our support team and we’ll take care of it.
What payment methods do you accept?
What payment methods do you accept?
→ We accept all major cards, PayPal, Stripe, Apple Pay, and Google Pay.