Rainn

Bamboo Pull Up Romper - Cosmic

$32.00 USD

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Shipping calculated at checkout.

Size 0/3M 3/6M 6/12M 12/18M 18/24M 2T

Between sizes? We recommend sizing up.

Size guide

Size Guide

Sizing varies by brand. Each brand uses its own measurements, and some styles run large or small. For the most accurate fit, check the size chart and sizing notes on each product page before you order.

How to measure

Height: measure from the top of the head to the heels, standing (or lying flat for babies).
Weight: use your child's most recent weight.
If your child is between sizes, we recommend choosing the larger size for room to grow.

General baby & toddler size reference (inches)

Use this chart as a starting point only. Always defer to the brand's own size chart on the product page.

Size	Height (in)	Weight (lb)
Newborn / 0–3M	up to 24"	up to 12.5
3M / 3–6M	24–26.5"	12.5–16.5
6M / 6–9M	26.5–28.5"	16.5–20.5
9M / 9–12M	28.5–30"	20.5–24
12M / 12–18M	30–32"	24–27.5
18M / 18–24M	32–33.5"	27.5–30
24M / 2T	33.5–36"	30–32
3T	36–38.5"	32–35
4T	38.5–41"	35–39
5T	41–44"	39–44

Questions about fit? Email customercare@augustandwillow.com and we'll help you pick the right size.

Ships directly from Rainn. $7.95 shipping per brand, free on orders $125+.

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Cosmic - Pull Up Romper 🌙⭐

Adventure starts here with the Bamboo Pull Up Romper. This dreamy, space-inspired print is filled with smiling moons, twinkling stars, cheerful planets and drifting clouds across a starlit sky. It’s designed to spark imagination, making every moment—from backyard play to bedtime stories—feel a little more magical.

Made from our signature RainnWeave™ bamboo blend, the Cosmic Pull Up Romper is buttery soft, breathable and kind to sensitive skin. The pull-up design makes outfit changes quick and simple—no extra snaps or zippers to fuss with while the lightweight, temperature-regulating fabric keeps babies comfortable in every season. A tag-free interior ensures smooth comfort against delicate skin.

Parents love the thoughtful design—durable fabric that stands up to daily wear, softness that only deepens with time and adaptability that moves with every crawl, roll and cuddle. Practical enough for everyday adventures yet playful enough for special moments, it’s a wardrobe favorite you’ll reach for again and again.

From playtime to naptime, the Bamboo Pull Up Romper combines comfort, ease and imagination. And with every romper helping restore vital kelp forests, your purchase helps protect our oceans for the future.

Shipping & Delivery

This item ships directly from Rainn, separately from the rest of your order, and arrives in its own package with tracking.

Free US shipping on orders $125+. Under $125, shipping is $7.95 per brand.

Full shipping details

Returns & Exchanges

Rainn: Return unused items with tags in original packaging within 30 days of delivery. The brand provides a return label.

To start a return, email customercare@augustandwillow.com or use our contact form with your order number. We’ll confirm with the brand and send instructions. See return terms for every brand