• Red cotton t-shirt with a playful number one design on the front for parents at first birthday parties
  • Person wearing a red t-shirt with a pink number one design on a white background
  • Red t-shirt with a pink number '1' design for a first birthday party
  • Red t-shirt with a number '1' design on the front, displayed from front and back views
  • Person wearing a red t-shirt with a fun number one design for one year old birthdays
  • Person wearing a red t-shirt and blue jeans on a white background
  • Person wearing a red t-shirt with a pink number '1' design for a first birthday party
  • Man wearing a red t-shirt on a white background
  • Man wearing a red t-shirt with a pink number '1' design for first baby birthdays
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Birthday T-Shirt – Number "1" – Matching Party Set – First Birthday Outfit

Birthday T-Shirt – Number "1" – Matching Party Set – First Birthday Outfit

€24,00 EUR
€24,00 EUR
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Taxes included. Shipping calculated at checkout.

Make your little one’s big day even more special with this bright and playful 1st birthday T-shirt, featuring a bold number "1" design with fun eyes and cheerful colours. Perfect for birthday parties, cake smashes, or photoshoots!

This tee is part of a matching family set — available in adult sizes so parents can join the fun, and there's also a matching baby bodysuit for the ultimate first birthday outfit.

  • 100% cotton
  • Fabric weight: 5.0–5.3 oz/yd² (170-180 g/m²)

This product is made especially for you as soon as you place an order, which is why it takes us a bit longer to deliver it to you. Making products on demand instead of in bulk helps reduce overproduction, so thank you for making thoughtful purchasing decisions!

Size guide

  LENGTH (cm) WIDTH (cm) SLEEVE LENGTH (cm)
S 71.1 45.7 39.7
M 73.7 50.8 43.2
L 76.2 55.9 47
XL 78.7 61 50.8
2XL 81.3 66 54.6
3XL 83.8 71.1 58
Size

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How it works

  • 1 – Choose your card

  • 2 – Personalise your design

  • 3 – Send a digital file or physical card

Frequently asked questions

What makes this T-shirt special?

Each shirt features my original hand-illustrated number “1” design with playful eyes — part of my matching parent-and-baby birthday set, printed especially for you.

How is the shirt printed?

It’s printed on demand using high-quality, durable inks that capture every detail of the illustration and stay vibrant after many washes.

What’s the fit and material like?

Soft, breathable cotton blend with a unisex fit that’s comfortable for all-day wear — perfect for parties, photos, and keepsakes.

How do I find the matching baby outfit?

You can find the coordinating baby bodysuit in the same design here to complete the set.

  • Made with ❤️ in the Netherlands

  • Loved around the world

Browse my other party designs