Amazon! Not expensive either. The reviews say the hat is small but it fits our baby just fine

Newborn Baby Floral Sleeping Gown,Swaddle Sack Coming Home Sleepwear Romper Sleeping Bags Outfit +Striped Hat (Floral, 0-18 Months) https://www.amazon.com/dp/B07H26NMXS/ref=cm_sw_r_cp_api_i_Y.xkCbR95BAH8