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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Funny white llama peeking from the corner with glasses, a red clown nose, and a mustache on a blue background.
Seamless Pattern Featuring Princesses with Crowns, Fairies with Wings and Wands, and Hearts. Magical Composition on Light Background. Decorative Design for Kids and Fantasy Themes. Vector Illustration
A repeating vector pattern featuring cowboy hats, sheriff stars, and rope coils on a white background. The design has a playful, western theme, ideal for textiles or children's decor.
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.
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
illustration of a cheerful, vibrant-colored zebra, perfect for a children's 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
A vibrant scattering of stylized rainbow flowers creates a lighthearted and colorful pattern against a stark white background, suggesting themes of nature, happiness, and joyful springtime bloom
vector illustration of a cute goldfish in cartoon style
A cute and playful illustration of a sunset with a kawaii aesthetic, featuring a smiling sun peeking over colorful stripes. Perfect for creative projects involving cute and fun designs, summer themes,
A Cute cartoon bus with smiling face, rain clouds, and raindrops, perfect for rainy day theme
Seamless Pattern of Princesses with Crowns, Birds, Stars, Hearts, and Leaves. Playful and Whimsical Design in Red and Pink Tones. Composition for Kids and Fantasy Themes. Flat Vector Illustration.
Simple repeating pattern of white ghosts on a dark blue backdrop, for Halloween decorations, textile prints, event branding
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Woman joyfully bathing a content cat in a tub full of bubbles. The illustration depicts a lighthearted pet grooming moment with smiles and relaxation. Perfect for pet care themes.
Celebrate International Cat Day on August with this illustrated image featuring adorable cartoon cats arranged neatly, conveying a theme of animal love and appreciation.
illustration of a cheerful, vibrant-colored penguin, perfect for a children or kid theme
Charming fairy with a green leaf dress and bun hairstyle. Vibrant colors and whimsical style enhance the magical theme
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
Squash Your Goals. Features playful pumpkin characters with whimsical details. Retro illustration style with hand-drawn lettering pumpkin themed pun. Warm yellow, green, and orange color palette.
Halloween-Themed 404 Error Page - Perfect for Festive Website Error Screens or Seasonal Designs
A playful vector pattern featuring alternating black mustaches and red bow ties on a white background, creating a whimsical and fun design.
Pink balloon shaped like a bear face floating against a plain background
Colorful turquoise balloons with flowing strings create a festive background pattern
Adorable cartoon frog with big eyes smiling amidst falling raindrops on a blue background. Illustration in doodle style perfect for cheerful and playful themes. Cartoon, doodle, adorable
A hilarious cartoon illustration of an animal pun
Halloween ghost pattern with Spooky and Halloween text, red background, textile, wallpaper, giftcard
Seamless Easter-themed pattern featuring playful bunnies with eggs, colorful rainbows, carrots, and baskets of eggs on a light gray background. Perfect for seasonal designs.
Soccer Coach - Humorous Definition T-Shirt Design
Charming fairy illustration with a green dress, blonde hair, and a blue bow. Bright colors and whimsical style enhance the magical theme
illustration of a cheerful, vibrant-colored zebra, perfect for a children's theme
uxurious spruce in a children's cartoon style"
Hand drawn simplistic illustration ice cream poster. Flat vector illustration. Perfect background for posters, cover art, flyer, banner.
illustration of a cheerful, vibrant-colored bear, perfect for a children's theme
Minimalist design of round black glasses paired with a red clown nose, highlighting humorous and playful themes.
A whimsical illustration of Santa Claus on horseback, blending Western cowboy elements with traditional Christmas themes. Perfect for festive holiday designs and greeting cards
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
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.
A whimsical and charming seamless pattern featuring white polar bears, depicted in a cartoon style, floating amidst a multitude of small white stars against a soft grey background.
Cute jester clown in a cupcake costume with a speech bubble on a light orange background, playful and perfect for April Fools.
illustration of a cheerful, vibrant-colored mouse, perfect for a children's theme
Fun Prankster T-Shirt Design - Prankster in Action Day 2025
Charming ghost character dressed in a witch hat while holding a pumpkin bucket, embodying the playful side of Halloween celebrations
Funny clowns and festive balloons, hand-drawn, doodle style
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
A collection of playful stickers showcasing adorable animals and love symbols in lovely pastel shades. Perfect for decorating journals or personal items, these designs evoke a cheerful vibe.
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.
Cheerful balloon with a smiling face in cartoon style, vector illustration
illustration of a vibrant-colored Giraffe, perfect for a children or kid theme
Vector illustration of a fairy in two styles: line art and vibrant color. Features detailed wings and playful expression
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Illustration of a man with magnifying glass

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