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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Colorful hand drawn seamless sun pattern on a white background for kids cute cheerful design vector illustration
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
vector illustration of a cute goldfish in cartoon style
Playful ghost character enthusiastically shouting "Boo" with raised arms, embodying the fun and festive spirit of Halloween
Set of cheerful clowns and balloons in color and black-and-white versions
Colorful balloons in various shapes design for festive celebrations and events
Adorable cartoon bear holding a big orange heart with floating hearts above. Perfect for Valentines Day, love, and friendship themes. Cute Bear Holding Heart with Love
illustration of a cute, vibrant-colored capybara, perfect for a children's theme
Colorful planets with happy faces, rings, stars, and moons on a bright pink background cartoon vector illustration for educational materials, or fun space-themed
illustration of a cute, vibrant-colored elephant, perfect for a children's theme
A delightful collection of flying insects adorning a white background creating a whimsical pattern
Cute Easter-themed illustration with smiling flowers, sun, tree, cake, cupcake, and nature elements.
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
A Cute smiling cloud with raindrops, perfect for rainy day theme
Blue polka dot balloon in cartoon style, vector illustration
Whimsical Monkeys: Funny Monkey Faces Vector Illustration Set
Seamless vector pattern featuring adorable cartoon sheep wearing Santa hats and festive holly sprigs, perfect for Christmas-themed designs and winter celebrations.
Charming fairy illustration with vibrant colors, featuring blue wings and a green dress. Playful pose and joyful expression enhance the magical theme
illustration of a cheerful, vibrant-colored duck, perfect for a children or kid theme
Seamless pattern with adorable Cartoon Cat Collection With Fun Summer and Adventure Themes
Just Be Cool T-shirt Design Featuring a Cartoon Bear on a Scooter
illustration of a cheerful, vibrant-colored Lobster, perfect for a children's theme
illustration of a cheerful, vibrant-colored chicken, perfect for a children or kid theme
Flat Vector Illustration of Seamless Pattern with Abstract Flowers and Leaves. Vibrant Pink, Yellow, and Green Palette. Decorative Design for Backgrounds, Wrapping Paper, or Textile Prints
A set of pastel balloons — mint green, peach, lavender, orange and sky blue — lift a rectangular sign hand-lettered with “Back to school” against a soft gradient blue sky.
Cute orange cat practicing mindfulness, surrounded by positive emotions, perfect vector for mental health and self-care themes
Colorful pirate pattern with cartoon characters and treasure chests.
Cute cartoon birds on a deep blue background in a playful pattern design
Illustration of four colorful outlined heart shapes arranged around the word LOVE in bold letters. Modern romantic design on a white background for Valentine's Day or love-themed projects.
An adorable seamless pattern featuring cute baby hippos enjoying a dip in basin, accompanied by whole and sliced watermelons. The hippos are illustrated in a playful style.
Colorful and playful illustration featuring the text "LOL" with an emoji design expressing joy, laughter, and humor. Ideal for entertainment, chat, and lighthearted communication themes
The cartoon crab displays a range of funny facial expressions, from puzzled to delighted, captivating with its playful antics against a clean white background.
illustration of a cheerful, vibrant-colored cat, perfect for a children's theme
Trendy Soft Pink Petal Pattern
illustration of a cheerful, vibrant-colored Beaver, perfect for a children's theme
Whimsical skeleton dancing happily with a stylish hat and festive orange accents creating a joyful spooky vibe
Cartoon hand walking with fingers on a white background, illustrating themes of communication, movement, and playful interaction in a vibrant and inviting manner
Simple house icon with a chimney and smoke, featuring a clean line art style. Perfect for home, real estate, and family themes, children's designs, greeting cards, and lighthearted themes.
Seamless Pattern With Dog and Cat Vector, in the Style of Light Black and Red, Linear Patterns and Shapes, Humor Meets Heart, Animated Gifs, Catcore, Stenciled Iconography, Shaped Canvas
Vector illustration of a fairy with blue wings, blonde hair, and green attire. Bright colors and playful expression enhance the whimsical theme
Seamless Pattern of Mermaids with Crowns, Seashells, Starfish, Fish, and Seaweed. Playful Marine Theme on Light Background. Decorative Design for Kids and Fantasy Stories. Flat Vector Illustration
Birds, Petals, and Hearts Pastel Pattern
Cartoon Moon Character Playing Video Game with Controller – Cute and Whimsical Nighttime Illustration
Cute Valentine's Day Heart-Shaped Candies with Messages
Funny white llama peeking from the corner with glasses, a red clown nose, and a mustache on a blue background.
Cheerful children's design of a girl standing under an umbrella, perfect for playful illustrations, greeting cards, and seasonal designs.
illustration of a cheerful, vibrant-colored Crocodile, perfect for a children's theme
illustration of a cheerful, vibrant-colored bear, perfect for a children's theme
Cute aquatic animal pattern with dolphins, whales, fish, and squids in teal and white.
Charming smiling blue cloud face cartoon perfect for children's designs. Vector Illustration.
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Illustration of a man with magnifying glass

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