Frequently Asked Questions
Everything you need to know about your new favorite comfort wear.
How do I find the right size for my onesie?
Our onesies are designed for a relaxed, cozy fit. We recommend referring to our detailed Size Guide, which uses height and weight measurements to ensure you find the perfect match for your body type.
What materials are used in Onesies Brand products?
We prioritize comfort and durability. Most of our products are crafted from premium, ultra-soft fleece or breathable organic cotton blends to ensure they stay soft wash after wash.
How long will it take for my order to arrive?
Standard shipping typically takes 3-7 business days within the continental US. Once your order ships, you will receive a tracking number via email to monitor its progress.
What is your return and exchange policy?
We offer a 30-day happiness guarantee. If you are not completely satisfied with your purchase, you can return or exchange unworn items with original tags attached within 30 days of delivery.
How should I wash and care for my onesie?
To maintain the softness of the fabric, we recommend machine washing on a cold, gentle cycle and tumble drying on low heat. Avoid using bleach or ironing directly on any printed graphics.
Do you offer international shipping?
Yes, we ship to over 50 countries worldwide. International shipping rates and delivery times vary by location and will be calculated at checkout.