55 lighthearted theme designs graphics for t-shirt and print on demand merch

Download lighthearted theme t-shirt designs and other merch graphics like book covers, phone cases, tote bags and more.

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The word JOLLY concept written in colorful abstract typography. Vector EPS 10 available.
Cheerful children's design of a girl standing under an umbrella, perfect for playful illustrations, greeting cards, and seasonal designs.
Hand-drawn collection of vector spot art doodles with Christmas theme. Line drawing on one layer, color fills on another and shadow on bottom layer: easy to separate and recolor.
Smiling butterfly with teal and pink patterned wings, perfect for spring decor, whimsical illustrations, or lighthearted insect-themed children’s designs.
A striped sphere is shown in a cartoon drawing style. The playful round object is perfect for summer activities and coastal themes. Cartoon vector illustration
Cloud with stars on a thread. On a white background
Adorable ghost character wearing a playful pumpkin-themed hat and holding a smiling pumpkin bucket, perfect for Halloween festivities
Humorous Cartoon Cockroach Depicted In Different Comical Situations And Expressions. Vector Insect Themed Illustrations
A diverse collection of 50 linear dot icons representing various fantasy themes, showcasing elements like carnival, entertainment, and whimsical activities in a playful design.
Hand drawn simplistic illustration ice cream poster. Flat vector illustration. Perfect background for posters, cover art, flyer, banner.
Dual Halloween ghost pattern, orange and white. For fabric design, packaging, or digital backgrounds
Bright and playful April 1 text on a light blue cloud shape, perfect for April Fools Day themes and celebrations.
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Clown in a cupcake costume on a purple background with a blank speech bubble, perfect for April Fools or humor themes.
Kiss a Ginger Day – January 12, 2025, Attractive design, can be used on all social media platforms, beautiful color combination, get it now for the first purchase.
Colorful umbrellas and fluffy clouds with stylized raindrops. A fun weather-themed design with a vibrant blue background. Great for children’s fabric prints and rainy season decorations.
illustration of a cheerful, vibrant-colored polar bear, perfect for a children's theme
Colorful pattern featuring playful narwhals and seashells in a whimsical underwater theme
A whimsical illustration of Santa Claus on horseback, blending Western cowboy elements with traditional Christmas themes. Perfect for festive holiday designs and greeting cards
illustration of a cheerful, vibrant-colored deer, perfect for a children's theme
Colorful balloons in various shapes create a playful festive atmosphere for a celebration
A vibrant illustration of a skeleton hand making a peace sign, surrounded by colorful confetti. Ideal for Halloween themes, celebrations, and cheerful designs.
Cartoon-style burglar dressed in warm clothes with a sack, symbolizing crime, mystery, and detective themes in a lighthearted, animated design
illustration of a cheerful, vibrant-colored frog, perfect for a children's theme
Happy easter card with colorful eggs and bunny design.
illustration of a cheerful, vibrant-colored rabbit, perfect for a children or kid theme
Adorable bear with a basket of colorful flowers displayed in a charming vector illustration Perfect for designs related to kids, gifts, and nature themes
Bright and cheerful illustration of yellow flowers, creatively arranged with decorative tape. Perfect for designs, seasonal themes, crafting projects, or adding a touch of nature-inspired charm.
Cute and Cartoonish Bunnies: Adorable bunny clip art featuring chubby cheeks, expressive eyes, and endearing poses, perfect for creating charming and lighthearted Easter-themed content.
Adorable farm animals and plants in a cartoon vector illustration
A cheerful and minimalistic party-themed planner or calendar template featuring a soft pastel yellow background
Vector illustration of a playful black cat lounging on a broomstick, surrounded by Halloween-themed elements and text promoting a party on October 31. Perfect for festive invitations.
illustration of chalkboard, perfect for a kid school or education theme
Halloween-themed vector illustration featuring a playful black cat sitting beside a carved pumpkin with two friendly spiders. Perfect for festive designs and Halloween decorations.
illustration of a cheerful, vibrant-colored Octopus, perfect for a children's theme
This adorable cartoon ghost character holds a playful pumpkin, capturing the spirit of Halloween festivities. Perfect for seasonal decorations or joyful illustrations.
Red balloons with strings arranged in a fun pattern on a white background
illustration of Chair, perfect for a kid school or education theme
illustration of a cheerful, vibrant-colored pig, perfect for a children's theme
Monster Helpers set. Each character embodies a unique work-related concept, bringing a lighthearted touch to professional themes. Vector illustration
Sweet illustration of a white puppy with pink ears sitting on a pastel mint green background. Perfect for lighthearted and joyful design themes.
illustration of a cheerful, vibrant-colored pony, perfect for a children's theme
illustration of a cheerful, vibrant-colored chicken, perfect for a children or kid theme
illustration of a cute, vibrant-colored elephant, perfect for a children's theme
A playful cartoon character making a silly face and gesture, perfect for fun and lighthearted themes
illustration of a cheerful, vibrant-colored dog, perfect for a children or kid theme
Seamless Pastel Easter Egg Pattern on Light Background. Colorful Egg-Shaped Pattern in Soft Pastel Tones. Minimalist Pastel Egg Design for Spring
Funny skeleton waves cheerfully against a black background, perfect for Halloween decorations and themes
illustration of number 1, perfect for a kid school or education theme
Playful ginger tabby cat finds itself adorably entangled in yarn, its paws wrapped around a ball of gray thread, creating a whimsical and charming scene
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Illustration of a man with magnifying glass

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