Peekaboo Seal Baby Romper
*Sizes 70 & 80 is on backorder, ETA early to mid December. Orders with in-stock items will ship together once it arrives. To receive in-stock items earlier, please contact us.
Peekaboo, I see you!
This adorable animal-themed onesie brings a splash of fun with its 3D puffy fins and a playful tail that wiggles along—just like a cheeky seal ready for a game of peekaboo! The interactive design encourages tiny hands to play, touch, and discover.
Crafted from premium milky cotton, it’s cooling, ultra-soft, breathable, and gentle on delicate skin—perfect for all-day comfort. Snap buttons at the shoulder and crotch make dressing and diaper changes a breeze.
Available in sizes 0 to 24 months, with a matching tee for older kids—perfect for twinning, playdates, and sibling bonding!
| Size reference: | |||
| Size | Length | Shoulder | Chest |
| 60 (0-6M) | 42cm | 23cm | 28cm |
| 70 (6-12M) | 45cm | 24cm | 30cm |
| 80 (12-24M) | 48cm | 25cm | 32cm |
| *All dimensions are measured lying flat. | |||
Size Guide
| mimi mono Size | Age | Height (cm) | Weight (kg) | EUR Size | US Size |
| 60 | 0-6 months | 50-60 | 4-7 | Newborn–3M | Newborn–3M |
| 70 | 6-12 months | 60-70 | 7-9 | 3-6M | 3-6M |
| 80 | 12-18 months | 70-80 | 9-11 | 6-12M | 6-12M |
| 90 | 18-24 months | 80-90 | 11-13 | 12-18M | 12-18M |
| 100 | 2-3 years | 90-100 | 13-15 | 2-3Y | 2T-3T |
| 110 | 4-5 years | 100-110 | 15-18 | 4-5Y | 4T-5T |
| 120 | 6-7 years | 110-120 | 18-20 | 6-7Y | 6-7 |
| 130 | 7-8 years | 120-130 | 20-25 | 7-8Y | 7-8 |
| 140 | 9-10 years | 130-140 | 25-35 | 9-10Y | 10 |
| 150 | 10-14 years | 140-150 | 35-45 | 11-13Y | 12-14 |
| 160 | 14 years - Adult (Unisex) | 150-160 | 45-55 | Teen/XS | US 0-2 |
| S | Adult (Unisex) | - | - | EUR 32-34 | US 4-6 |
| M | Adult (Unisex) | - | - | EUR 36-38 | US 8-10 |
| L | Adult (Unisex) | - | - | EUR 40-42 | US 10-12 |
Shipping Rates
👋 We ship worldwide!
[IMPORTANT NOTE: All orders are shipped from either Hong Kong or Singapore. Import taxes and customs fees are not included in the final payment for all orders outside of Hong Kong and Singapore.]
*For members and non-members, import taxes and customs fees are excluded; the delivery service company will contact you for these payments separately.
*Orders under ¥10,000 are tax-free. For orders over ¥10,000, a 10% standard import tax will apply based on your total order amount.
Shipping rates within Japan
Free for mimi mono members for a limited time only! Regular shipping fees will be applied per order for local non-members. Join membership for free here.
Do you ship internationally?
Yes. Shipping costs are auto-calculated by weight and shown at checkout.
When will my purchase ship?
In-stock items typically ship out within 3-5 business days after the order is placed. Pre-orders ship once they arrive; check each pre-order product page for estimated arrival dates.
How long will my parcel take to arrive?
Delivery duration is between 3-7 business days, depending on your location.
How can I track my order?
You’ll get an email with tracking information as soon as your order ships.
Check out our exchange policy here.
[IMPORTANT NOTE: All orders are shipped from either Hong Kong or Singapore. Import taxes and customs fees are not included in the final payment for all orders outside of Hong Kong and Singapore.]
*For members and non-members, import taxes and customs fees are excluded; the delivery service company will contact you for these payments separately.
*Orders under ¥10,000 are tax-free. For orders over ¥10,000, a 10% standard import tax will apply based on your total order amount.
Shipping rates within Japan
Free for mimi mono members for a limited time only! Regular shipping fees will be applied per order for local non-members. Join membership for free here.
Do you ship internationally?
Yes. Shipping costs are auto-calculated by weight and shown at checkout.
When will my purchase ship?
In-stock items typically ship out within 3-5 business days after the order is placed. Pre-orders ship once they arrive; check each pre-order product page for estimated arrival dates.
How long will my parcel take to arrive?
Delivery duration is between 3-7 business days, depending on your location.
How can I track my order?
You’ll get an email with tracking information as soon as your order ships.
Check out our exchange policy here.
Exchange & Returns
What's your exchange policy?
We accept exchanges for unworn, unwashed items within 14 days upon receiving your parcel. This applies to regular-priced items only. Customers will be liable for shipping and handling costs unless the exchange is due to manufacturing defects. Sale items, discount code orders, and accessories are non-exchangeable.
How do I request an exchange?
Contact us at business@mimimono.com for assistance.
Do you accept refunds?
We do not accept refunds due to hygiene reasons, unless it is on a case by case basis.
We ship worldwide. Check our shipping rates here.
We accept exchanges for unworn, unwashed items within 14 days upon receiving your parcel. This applies to regular-priced items only. Customers will be liable for shipping and handling costs unless the exchange is due to manufacturing defects. Sale items, discount code orders, and accessories are non-exchangeable.
How do I request an exchange?
Contact us at business@mimimono.com for assistance.
Do you accept refunds?
We do not accept refunds due to hygiene reasons, unless it is on a case by case basis.
We ship worldwide. Check our shipping rates here.
Peekaboo Seal Baby Romper
Sale price¥3,980 JPY
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Peekaboo Seal Baby Romper
Sale price¥3,980 JPY