Mermaid Birthday Invitation Maker
The under-the-sea theme fills the card with shells, starfish and coral in aqua and lavender, often with a mermaid, and uses whimsical script lettering that curls like a wave. The palette is cool and shimmery, unlike the warm colors of most party cards.
Add the birthday person's name, the date and the venue, and PiCraft places them on the card with the name in the largest type. It is ready for a pool party invitation or a message to the group chat.
This is the Under the sea theme of the Birthday Invitation Maker. The form on this page opens with it already selected.
Under the sea examples
Who the Under the sea theme suits
Pool and beach parties
A swim party at a community pool, a beach club or a splash pad matches the ocean artwork.
Mermaid-loving children
Children who dress as mermaids, or love marine animals, get an invitation that sets the mood for the day.
Seaside family gatherings
The cool palette also suits a birthday near the coast, such as a picnic on the sand.
Getting the best Under the sea result
- 1
Mention swimwear in the RSVP line
"RSVP to Marta · 555-0143 · bring a swimsuit" tells guests what to pack without adding more text to the card.
- 2
Keep the name short for the script
Whimsical script is lovely but harder to read at length, so a first name is a safer choice than a full name.
- 3
Echo the colors in the cake
Aqua frosting, lavender sprinkles and edible pearls bring the shell and coral palette to the table.
- 4
Test the pale blues on paper
Aqua and lavender can shift when printed at home. A matte stock and one test copy help you catch any color surprises.
Ideas to try
- Name: "Luna", age: "is turning 7!", place: "Coral Beach Club, 9 Seaview Drive"
- Time: "1:00 – 4:00 PM" with the RSVP line "Bring a swimsuit and towel"
- A toddler splash party: name "Isla", age "is 3!", place "Seashell Splash Pool"
- A joint party for cousins: name field "Emma & Zoe"
What you download
Every design from the Birthday Invitation Maker comes with the files for the job, whichever theme you choose:
- Share image 1080×1500 JPG
- Print PDF 5×7 in with 0.125 in bleed
- Print JPG 5×7 in with bleed, 300 DPI
Questions about the Under the sea theme
Does the card always show a mermaid?+
The theme includes shells, starfish and coral and often a mermaid, but each generation is different. Generate again if you want to see another arrangement.
Can I use it for a pool party?+
Yes. Put the pool name in the place field and add what to bring in the RSVP line.
Can I make matching decorations?+
You can make other cards with the same theme in the same maker, but they will not be identical designs. For decorations, use the colors as inspiration.
Can the invitation be sent by WhatsApp?+
Yes. Download the 1080×1500 px share image and send it like a photo. For printing details, see the birthday invitation size guide.
Birthday invitation themes
Guides
Birthday Invitation Size for Print and Group Chats
Birthday invitation size for kids' parties: 5×7 in print with bleed, A7 envelopes, home printing on 8.5×11 in stock, and 1080×1500 px for texts and chats.
Size guideEvent Flyer Size for Print and Social Media
Event flyer sizes: US Letter 8.5×11 in with bleed for print, 1080×1350 px feed posts, 1080×1920 px Stories, and A4 dimensions in millimeters.
Size guideSticker Size and File Requirements
Sticker file sizes for print and cut: 300 DPI PNGs, common 2–3 in prints, die-cut vs kiss-cut, white borders, pixel math, and Cricut Design Space upload steps.