Funny 40th Birthday Unisex T-Shirt

A funny birthday design made for anyone who refuses to take age too seriously.

This t-shirt features the phrase “I’m Not 40, I’m Thirty-Ten” — a playful and relatable design for celebrating a 40th birthday with humor, confidence, and a little attitude. It makes a great birthday outfit, party shirt, or gift for someone turning 40.

Designed for everyday comfort and effortless style.

This graphic t-shirt is made to be worn your way, whether you are heading out, relaxing at home, meeting friends, or creating a casual everyday outfit. With a relaxed fit and durable feel, it is a versatile piece that works for daily wear, casual looks, layering, or gifting.

Why you’ll love it:

• Funny 40th birthday design

• Comfortable relaxed fit

• Easy to style with jeans, joggers, shorts, or layered outfits

• Durable heavyweight feel

• Pre-shrunk fabric to help maintain the fit

• No side seams for a clean, classic shape

• Printed on demand after your order is placed

• Great for birthdays, casual wear, everyday outfits, and gifts

Product features:

• 100% ring-spun cotton

• Soft garment-dyed fabric

• Relaxed unisex fit

• Heavyweight feel

• Durable double-needle stitching

• Direct-to-garment print

• Made to order

Fit:

This t-shirt has a relaxed unisex fit. Choose your usual size for a standard fit, or size up for a more oversized look.

Care instructions:

Machine wash cold, inside out. Tumble dry low or hang dry. Do not bleach. Do not iron directly on the design.

Please note:

Each item is made to order. Colors may appear slightly different depending on your screen settings.

Size Chart :