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What's Up, Buttercup Onesie
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Dress your little ray of sunshine in this adorable "What's Up, Buttercup" baby onesie! Featuring a cheerful design of bright yellow buttercup flowers and the playful phrase in bold, eye-catching text, this onesie adds a fun and sweet touch to your baby's wardrobe.
Made from soft, breathable cotton, it’s gentle on delicate skin and features snap closures for easy diaper changes. Perfect for photos, playtime, or gifting to new parents, this onesie is a delightful way to share smiles and positivity with the tiniest member of the family!
More details
- 100% ring-spun combed cotton
- Heather colors are 52% ring-spun combed cotton and 48% polyester
- Lightweight fabric: 3.9 oz/y² (132.2 g/m²)
- Regular fit
EU GPSR Product Information:
- Manufacturer contact information
- Name: TriviaLuvs
- Email: contact@support.trivialuvs.com
- Postal address: PO Box 5696 Santa Monica, CA 90405
- Additional information: This product is made for children. Meets the Sharp Points, Sharp Edges and Small Parts requirements, and lead, cadmium, phthalates, formaldehyde, bisphenols, azo dyes, Alkylphenols (APs) and Alkylphenol, Ethoxylates (APEOs), extractable heavy metals, fluorine, and forbidden and disperse dyes level requirements. 2 year warranty in EEA and UK, established by Directive 1999/44/EC.
Size & Fit
Quality Guarantee & Returns
- Quality is guaranteed. If there is a print error or visible quality issue, we'll replace or refund it.
- Because the products are made to order, we do not accept general returns or sizing-related returns.
What's Up, Buttercup Onesie Size Guide

Size label | Length | Width | Fits weight (lbs) |
---|---|---|---|
3-6m
|
20
|
9
|
12
|
6-12m
|
25
|
9
|
16
|
12-18m
|
28
|
10
|
22
|
18-24m
|
30
|
10
|
27
|