Choose by your baby's height first, then weight. Check our size guide for exact measurements. Between two sizes? Size up for a roomier, cozier fit — babies grow fast!

Our costumes are made of soft plush fleece. They are warm and cozy, so dress your baby lightly underneath and adjust to the room temperature.

Our onesies are designed as cozy costumes for playtime, photos and special occasions. For sleep, always follow safe sleep guidelines: hood down, no overheating, baby on their back.

Machine wash cold (86°F / 30°C), inside out, with similar colors. Tumble dry low or hang dry. Do not bleach and do not iron the decorative parts.

Orders ship within 1–3 business days and arrive in 7–15 business days. Free US shipping on orders over $50. See our shipping policy for details.

As soon as your order ships, you'll receive an email with your tracking link. Can't find it? Check your spam folder or contact us with your order number.

For now we only ship to addresses in the United States.

Yes, as long as it hasn't shipped yet. Contact us as soon as possible with your order number and we'll do our best to help.

No worries — you have 30 days to return or exchange unworn items, for free. See our returns policy or contact us and we'll help you find the right size.

All major credit and debit cards, Apple Pay, Google Pay, Shop Pay and PayPal. Payments are processed securely — we never see or store your card details.

Absolutely! Our costumes are a favorite for baby showers, first birthdays and Halloween. Not sure about the size? Pick by age — the parents can exchange it for free within 30 days.