Mademark SpongeBob I Know Everything I'm 6 Funny Birthday T-Shirt
Mademark SpongeBob I Know Everything I'm 6 Funny Birthday T-Shirt
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
**Mademark x SpongeBob SquarePants - SpongeBob I Know Everything I'm 6 Birthday T-Shirt**
🎉 **Celebrate in Style!**
Transform your little one's 6th birthday into an unforgettable celebration with the Mademark x SpongeBob SquarePants T-Shirt! This delightful tee is perfect for any boy who wants to showcase his cool personality and pride in turning six.
💚 **Vibrant and Fun Design**
The shirt features an eye-catching graphic of SpongeBob himself, encapsulating the iconic character's joyful spirit. The playful text, "I Know Everything I'm 6," adds a whimsical touch that will appeal to kids and parents alike.
👕 **Comfort Meets Quality**
Made from soft, breathable fabric, this T-shirt ensures that your child feels comfortable while they enjoy their special day. The classic cut fits perfectly and is designed for easy movement, making it ideal for playtime and birthday parties.
🌈 **A Gift to Remember**
Searching for a perfect birthday gift? This fun t-shirt makes a fantastic choice for any young SpongeBob fan! Whether it’s for a party, daily wear, or a special birthday celebration, it’s sure to bring smiles and laughter.
✨ **Attention to Detail**
Available in a bright yellow hue, reminiscent of SpongeBob himself, this t-shirt is a must-have addition to your child's wardrobe. It’s durable enough to withstand countless adventures while keeping its vibrant colors wash after wash.
📏 **Sizing Information**
Find the perfect fit for your little one – please refer to the size chart for optimal sizing!
Make your child’s sixth birthday a splash with the Mademark x SpongeBob SquarePants "I Know Everything I'm 6" T-Shirt! It's not just clothing; it's a statement of fun, adventure, and the essence of being six!
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.