Dress your little girl up for St Patricks Day with this Lucky Unicorn shirt! This St Patricks day unicorn shirt is 100% cotton. The art is created using heat pressed vinyl. Onesies are available in the following sizes: Newborn (Up to 21.5" Height / 5 - 8lbs) 3 Months (21.5" - 24" Height / 8 - 12.5lbs) 6 Months (24" - 26.5" Height / 12.5 - 16.5lbs) 9 Months (26.5" - 28.5" Height / 16.5 - 20.5lbs) 12 Months (28.5" - 30.5" Height / 20.5 - 24.5lbs) 18 Months (30.5" - 32.5" Height / 24.5 - 27.5lbs) The shirts are available in the following sizes: 2T Youth X-Small (Equivalent to size 3-4) Youth Small (Equivalent to size 5-6) Youth Medium (Equivalent to size 7-8) Youth Large (Equivalent to size 10-12) Youth XL (Equivalent to size 14-16) When ordering please choose your size preference from the drop-down menu above. Care When machine washing please turn the garment inside out and wash in cold water and use a tumble dry temperature of low. Shipping There is a 24-48 hour turnaround time once your order is placed. We ship via USPS. You can choose from either FREE First Class Shipping (2-5 Business Days) or Priority Mail (1-3 Business Days). Both options will provide you with tracking details.