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Price:$22.99+

13th Birthday Shirt - 13 Years Old Algebra Equation Funny 13th Birthday Math T-Shirt

ReallyAwesomeShirts  
5 out of 5 stars

Ships from New York

Arrives soon! Get it by Aug 7-10 if you order today
Aug 7-10

Returns & exchanges accepted

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Star Seller. This seller consistently earned 5-star reviews, shipped on time, and replied quickly to any messages they received.

Highlights

  • Designed by ReallyAwesomeShirts
  • Ships from New York! Shorter shipping distances are kinder to the planet

  • Materials: cotton

• Made to order
• 100% cotton shirt (Grey is 90% cotton/10% polyester)
• Printed in the USA using industry leading direct-to-garment printing technology
• Water based inks certified to be safe for adults and children, including babies
• Machine washable
• Each order is backed up with a 100% satisfaction guarantee. If you have any issues with your order, please get in touch within 30 days and we'll make it right.
• See pictures for size chart

  • Order today to get by Aug 7-10
  • Returns & exchanges accepted within 30 days
  • Cost to ship: $4.98
    Enjoy free shipping to the US when you spend $35+ at this shop.
  • Ships from: Spring Brook, NY

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Reviews for this item

What buyers say, summarized by AI: Perfect gift Looks great Fast shipping Love it Great quality

5.0

We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience.

(37 reviews)

5.0 Item quality
5.0 Shipping
5.0 Customer service
100% Buyers recommend
Filter by category
5 out of 5 stars 5 This item

Angela Jun 10, 2026

T shirt was sent fast.

Angela Jun 10, 2026

5 out of 5 stars 5 This item

Donna Mar 5, 2026

Can’t wait to give this to someone special!

Donna Mar 5, 2026

5 out of 5 stars 5 This item

Zac Jan 11, 2026

Cute shirt! Great gift for a 13 year old!

Zac Jan 11, 2026

5 out of 5 stars 5 This item

Amy Nov 7, 2025

Great item, will be a great gift.

Amy Nov 7, 2025

ReallyAwesomeShirts
Kevin Garbes
ReallyAwesomeShirts ·

Orchard Park, New York

We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience. 4.9
·
46.2k sales
·
9 years on Etsy
Kevin Garbes
1 shop member
Message seller

Typically responds within a few hours

Typically responds within a few hours

Smooth shipping Has a history of shipping on time with tracking.

Speedy replies Has a history of replying to messages quickly.

Rave reviews Average review rating is 4.8 or higher.

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