Planning a mermaid-themed celebration? This guide reviews five top mermaid birthday invitations with pictures, focusing on eye-catching designs, durable materials, and ample space for party details. Each option includes envelopes and often stickers for a complete, ready-to-send package. The selections span whimsical glitter mermaids, watercolor ocean scenes, and playful under-the-sea motifs designed to delight kids and guests alike. Use the buying guide below to compare sizes, inclusions, and writing surfaces to find the best fit for your party invitations.
| Product | Brand | Highlights |
|---|---|---|
| Hotop 24 Sets Mermaid Birthday Invitations | Hotop | 24 invites, 24 envelopes, 24 mermaid stickers; purple envelope; glitter mermaid design |
| Doreen’s Boutique Birthday Invitations | Doreen’s Boutique | 20 cards with envelopes; 4×6 inches; quality writing paper |
| Soiceu Cute Under the Sea Invitations | Soiceu | 20 invitations and 20 envelopes; 3×6 inches; playful design |
| Uniizone Mermaid Invitation Cards | Uniizone | 30 cards with self-adhesive envelopes; 4×6 inches; watercolor theme |
| Putocopic Mermaid Girls Invitations | Putocopic | 30 invitations with envelopes; 5×7 inches; creative mermaid design |
Hotop Mermaid Birthday Invitations

The Hotop set includes 24 mermaid party invitations, 24 envelopes, and 24 mermaid stickers, providing ample quantity for sharing with guests. Each invitation measures about 15 x 11.5 cm (5.9 x 4.5 inches), and envelopes are about 15 x 12 cm (5.9 x 4.7 inches). The glittery mermaid artwork and purple envelopes offer a dazzling first impression, while the matching stickers let you add a decorative touch to mailings and party treasures. The design conveys warmth and care to recipients.
Doreen’s Boutique Mermaid Invitations

These 20 invitations with white envelopes are crafted from quality writing paper, offering a sturdy surface for fill-in details. Each card measures 4” x 6”, providing a clean layout for essential party information. The set emphasizes readability and ease of writing, making it suitable for both kids and adult organizers. The pack is ideal for Mermaid or Pirate-themed celebrations, delivering a classic invitation experience with a touch of oceanic charm.
Soiceu Under the Sea Invitations

Soiceu offers 20 invitations and 20 envelopes featuring a playful, under-the-sea design. Each card is about 3 x 6 inches, with a double-sided layout that maximizes space for party details while keeping a compact, easy-to-distribute size. The vibrant colors and kid-friendly graphics are designed to boost excitement for a mermaid-themed party, balancing fun with practicality for quick writing and mailing.
Uniizone Mermaid Card Set

Uniizone provides 30 watercolor-themed invitation cards with self-adhesive envelopes. The standard 4″ x 6″ size offers ample space for detailing guest information. Made from thick cardstock, these invitations are sturdy for writing with various pens and markers. The watercolor splish-splash design appeals to fans of ocean-inspired aesthetics, making them suitable for birthdays and pool party gatherings alike.
Putocopic Mermaid Invitations

Putocopic offers 30 mermaid-themed invitations with 30 self-adhesive envelopes. Each invitation measures 5 x 7 inches, providing generous space for party details and guest information. The design centers on a bright, kid-friendly mermaid motif, aiming to delight invitees and set a festive tone for the celebration. The included envelopes simplify sending, ensuring a cohesive, ready-to-mail package.
Buying Guide: Key Purchase Considerations
- Invitation size and writing space: Larger cards (4×6, 5×7) provide more room for party details; smaller cards save space but limit text.
- Inclusions: Look for sets that include envelopes and, if desired, stickers or seals for a cohesive presentation.
- Design and branding: Choose mermaid motifs that match the party theme—glitter, watercolor, or playful cartoon styles.
- Material quality: Thicker cardstock improves durability and writing ease; glossy finishes may enhance colors but can smudge with ink.
- Color and accessibility: Ensure colors contrast well with text for readability by guests and parents.
- Budget and quantity: Packages range from 20 to 30 invitations; consider guest list size and whether extra invites are needed for RSVP tracking.
- Turnaround and shipping: If timing is tight, verify shipping speeds and whether bulk sets are readily available for quick mailing.
- Future reuse: Neutral or versatile designs can double as keepsakes; plan for potential reuse in future events.