Size Chart
True to size with a roomy, grow-with-them fit — compare your child’s age, weight, and height to find the best match.
| Size | Age | Weight | Height |
|---|---|---|---|
| Newborn | Newborn | 8–12 lbs | 18–22" |
| 0-3 Months | 0–3 Months | 12–15 lbs | 21–25" |
| 3-6 Months | 3–6 Months | 14–17 lbs | 24–26.5" |
| 6-9 Months | 6–9 Months | 17–22 lbs | 26.5–29" |
| 9-12 Months | 9–12 Months | 19–25 lbs | 29–31" |
| 12-18 Months | 12–18 Months | 24–27 lbs | 31–33" |
| 18-24 Months | 18–24 Months | 27–30 lbs | 33–34" |
| 2T | 2 Years | 28–30 lbs | 34–36" |
| 3T | 3 Years | 31–34 lbs | 36–39" |
| 4T | 4 Years | 39–42 lbs | 39–42" |
| 5/6 | 5–6 Years | 39–48 lbs | 42–48" |
| 7/8 | 7–8 Years | 48–69 lbs | 48–54" |
| 9/10 | 9–10 Years | 69–87 lbs | 54–57" |
| 12/14 | 9–11 Years | 87–100 lbs | 58–61" |
| 16 | 12–13 Years | 110–120 lbs | 61–63" |
Why Choose Our Premium Bamboo Viscose Fabric?
Officially licensed UMD Terps zippy sleepers and pajamas in buttery-soft bamboo viscose — cozy comfort for your littlest fan.
Officially Licensed Maryland Terrapins Kids Pajamas
Every licensed sale we make generates a royalty payment to the University of Maryland to support their student athletes.
A Portion of your Purchase is Donated to:
Frequently Asked Questions
Is this Maryland Terrapins zippy one-piece officially licensed?
Yes — this sleeper is an officially licensed University of Maryland product. The Terrapins name, logos, and marks are used under license, and the design was approved through the university's official artwork approval process. A portion of every sale supports the school through licensing royalties.
What fabric is this sleeper made of?
This zippy one-piece is made from 95% bamboo viscose and 5% spandex (180 gsm) — the buttery-soft, stretchy fabric our sleepers are known for. The fabric is OEKO-TEX® Standard 100 certified, meaning it has been independently tested for harmful substances.
What sizes does this Terrapins sleeper come in?
Our zippy one-piece sleepers are designed for babies, with available sizes shown in the size selector above. Like most children's sleepwear, they're designed to fit snugly — so match your child's measurements to our Size Guide rather than sizing up for room.
How do I wash it?
Machine wash on a gentle or delicate cycle in cold water with a mild detergent, then line dry or tumble dry on low. Avoid bleach and fabric softeners to keep the fabric soft and the Maryland colors vibrant. Full details are in our Wash & Care guide.
When will my order arrive?
Shipping is a $5 flat rate within the contiguous U.S. Orders are typically processed within [1–2] business days, and standard delivery takes 3 to 8 business days from shipment. Expedited options, if available for your address, appear at checkout.
What if it doesn't fit?
We accept returns and exchanges within 30 days of delivery on unworn, unwashed items with tags attached and proof of purchase. If you're between sizes before ordering, contact us and we'll help you choose. Full details are in our Return & Refund Policy.
