Mademark SpongeBob 11th Birthday T-Shirt for Boys - Fun and Playful Design
Mademark SpongeBob 11th Birthday T-Shirt for Boys - Fun and Playful 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 in Style with the Mademark x SpongeBob SquarePants 11th Birthday Boy T-Shirt!** 🎉
Is your little one's eleventh birthday just around the corner? Make their special day extra memorable with the **Mademark x SpongeBob SquarePants - "I Can't Keep Calm It's My Eleventh Birthday!" T-Shirt**. This vibrant and playful tee is perfect for any SpongeBob fan ready to celebrate!
👕 **Product Details:**
- **Design**: Featuring the iconic SpongeBob SquarePants, this shirt showcases the whimsical phrase “I Can't Keep Calm It's My Eleventh Birthday!” in bold, fun typography that captures the excitement of turning 11.
- **Color**: The shirt comes in a lively yellow color reminiscent of our favorite sea sponge, ensuring your child stands out during their birthday festivities.
- **Material**: Made from high-quality, soft cotton fabric for ultimate comfort. It’s breathable and perfect for all-day wear, whether at a birthday party, school celebration, or a fun day out.
- **Fit**: Available in various sizes tailored to fit boys comfortably, ensuring they can enjoy their party without any restrictions.
💖 **Why Choose This T-Shirt?**
- **Unique Collaboration**: This exclusive Mademark x SpongeBob design makes for a one-of-a-kind birthday gift that every young fan will cherish.
- **Durable & Easy Care**: Machine washable and durable, this shirt promises to withstand the rigors of active play and numerous washes.
- **Great for Photos**: Capture the moment of joy with this eye-catching design that will look fantastic in birthday pictures!
🎈 **Perfect for Parties**: Whether it's a themed birthday bash or a casual gathering, this t-shirt is an ideal outfit choice that sparks joy and excitement in any celebration.
Make this birthday unforgettable with the **Mademark x SpongeBob SquarePants - I Can't Keep Calm It's My Eleventh Birthday! T-Shirt**. Order now and let the celebrations begin! 🎂✨
**Size Chart Available**: Check our size chart for your perfect fit!
**Gift it or Wear it**: This t-shirt makes a fantastic gift or a legendary birthday outfit for any SpongeBob enthusiast turning 11! 🌊
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.