Lilly Pulitzer Size small cotton dress

Orange, green, yellow, pink flowered sundress. Lined. Cotton w some stretch. I want to say vintage, but in really really good condition. Orange is a soft orange, looks red in photo but is definitely more orange. Dress says size 6- but it’s more size 4, small 4. I’m a solid 4 & it’s tighter on me than I like, not so much the dress itself but the lining.