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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illustration of a cute, vibrant-colored elephant, perfect for a children's theme
Cute seamless pattern design featuring playful hand drawn fish for kids design vector illustration
Birthday Toast at the Office
Funny love-themed doodle stickers with hearts, gifts and sweet treats for Valentine's Day
A whimsical collection of pastel-colored doodle elements featuring rainbows, cats, stars, houses, flowers, and nature icons. Perfect for children’s designs, stationery, digital scrapbooking, and playf
Creative illustration of a cartoon snake symbolizing the number three. Snake symbol of the year. Vector hand drawn bold illustration
illustration of a cheerful, vibrant-colored dog, perfect for a children's theme
Charming Autumn Illustrations Featuring Cute Characters and Cozy Rainy Day Scenes
Fun and friendly cartoon-style vector of a smiling onggi jar. Ideal for kids' projects, educational games, or lighthearted Korean-themed content. Bright colors and playful expression. Easy to customiz
Cartoon fridge with eyes and mouth sticking out of it. This playful asset is perfect for children's illustrations, kitchen-themed designs, and quirky product packaging.
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.
Pink balloon shaped like a bear face floating against a plain background
Minimalist design of clown glasses, a red nose, and a mustache on a bright blue background, symbolizing April Fools humor.
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Charming retro style floral pattern with simple blossoms and leaves on a teal background
Light blue background with white four-leaf clovers scattered evenly, featuring curved thin stems. The seamless, fresh pattern feels cheerful, whimsical, and perfect for spring or lucky-themed designs.
Vector pattern on a summer theme, with the image of a bag, hat, glasses, flip flop, for printing on a banner, fabric, paper, funny style
A hilarious cartoon illustration of an animal pun
A seamless vector pattern featuring cartoon-style hammers and mustaches on a white background. The hammers are brown with a wooden handle, and the mustaches are black with a curly design.
Cheerful ghost character smiling while holding three pumpkin-themed balloons, celebrating the joyful spirit of Halloween festivities
Graffiti tag “Laugh” in bold street handstyle. Urban vector lettering with joyful and expressive vibe—ideal for humor themes, positive street culture, and fun lifestyle graphic designs.
illustration of a cheerful, vibrant-colored turtle, perfect for a children's theme
illustration of cute penguin, perfect for a children or kid theme
Monster Helpers set. Each character embodies a unique work-related concept, bringing a lighthearted touch to professional themes. Vector illustration
A whimsical vector pattern featuring brown horses, sheriff stars, cowboy hats, and wanted signs on a white background. Ideal for playful designs or Western-themed projects.
Smiling clown in a cupcake costume with a speech bubble on a black background, creating a humorous and festive design.
A cartoon avocado rides a surfboard on ocean waves, enjoying a fun and playful moment. The cheerful character brings a lighthearted and tropical vibe, perfect for summer and adventure themes
Unique cat-shaped balloon floats against a plain backdrop
Trendy Soft Pink Petal Pattern
illustration of a cheerful, vibrant-colored dog, perfect for a children or kid theme
A Gentle Elephant Carrying a Bag, a delightful illustration, showcasing the playful side of wildlife, ideal for children's books and educational materials.
illustration of a cheerful, vibrant-colored duck, perfect for a children or kid theme
Fun and playful Halloween balloons featuring pumpkin, ghost, skull, and Frankenstein designs.
vector illustration bright seamless pattern with cartoon goldfish
A Cowboy hats in various styles showcase creativity and fun, perfect for any adventurous spirit
Seamless Cute Sleeping Cats and Moons Pattern for Cozy Pajamas, Pet-Themed Prints, or Relaxing Nighttime Designs
Set of cheerful clowns and balloons in color and black-and-white versions
illustration of a cheerful, vibrant-colored Koala, perfect for a children's theme
Person holding a love heart balloon cheerful expression. Celebration and happiness concept vector illustration.
Halloween ghost pattern with Spooky and Halloween text, red background, textile, wallpaper, giftcard
illustration of a cute, vibrant-colored elephant, perfect for a children's theme
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,
Cute bear illustration isolated on white designed for kids in simple style. Vector illustration
Charming ghost character dressed in a witch hat while holding a pumpkin bucket, embodying the playful side of Halloween celebrations
A refreshing tropical drink in a jar with a small umbrella, perfect for summer vibes.
A set of four stickers with palm trees and sun suitable for summer-themed designs, travel posters, tropical party invitations, and beach vacation promotions.
illustration of a cheerful, vibrant-colored dog, perfect for a children or kid theme
illustration of a cheerful, vibrant-colored pony, perfect for a children's theme
Seamless vector pattern featuring playful grey kittens chasing orange cookies, a charming and whimsical design perfect for kids' products or pet-themed projects.
A Who needs bunny when you have playful dog wearing bunny ears This charming illustration captures fun spirit of pets during Easter celebrations
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Illustration of a man with magnifying glass

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