Home / Colorado United baby onesie - Otto's Brand Colorado United baby onesie - Otto's Brand By Otto's Brand $ 17.00 America United Colorado flag Onesie. This fun kids onesie comes in 6, 12, 18, and 24 month sizes. 6 months - Sold out 12 months - Sold out 18 months - Sold out 24 months - $ 17.00 USD Add to cart Share this