The iconic Thing 1 and Thing 2 shirts bring the timeless charm of Dr. Seuss into your everyday wardrobe. Whether you're planning a family costume, celebrating twins, or organizing a fun group event, these shirts deliver an instantly recognizable and playful look. At Custom One Online, we make it easy to customize these classic designs with names, numbers, or unique color schemes to match your vibe.

Perfect for birthdays, school spirit days, Halloween, or just showing off your love for whimsical literature, our Thing 1 Thing 2 shirts are a hit with kids and adults alike. Plus, we offer same-day shipping for those last-minute celebrations that pop up out of nowhere—just like Thing 1 and Thing 2 themselves!

Looking to make your group stand out? Whether you're a pair of siblings, a couple, or an entire squad of "Things," our custom printing options let you create a full lineup of characters. Add your own names or switch up the numbers—Thing 3, Thing 4, Thing 5… the fun is endless!

Our apparel collection includes options for all sizes and styles:

Kids apparel for the littlest mischief-makers

Women’s styles for a flattering fit

Tank tops for summer or indoor events

Hoodies & sweatshirts for cozy group photos

Pants & shorts to complete your custom look

You can mix and match shirt types and colors while keeping the iconic “Thing” branding consistent.

Ready to let your inner Thing out to play? Browse our custom t-shirt collection and start creating your Thing 1 Thing 2 shirts now. Upload your design, pick your shirt style, and personalize your text—it’s that easy. Our design preview tools let you see exactly how your finished product will look.

Plus, with our advanced knowledge of printing methods like DTG, DTF, and screen printing, you can trust that your shirts will turn out exactly how you want—vibrant, fun, and photo-ready.