Knit sweater custom made/dark pink & blue

Vintage Knit sweater custom made/dark pink magenta & blue stripe No brand my aunt had a friend who made clothes for ST John and other brands back in the day and made her some outfits as well my aunt was quite petite so this would be a long oversized on petite. Not sure what the fabric is could be acrylic or? 18 1/2 inches flat across underarms 24 inches long 16 1/2 inch sleeves from top of shoulder Pair with other items to make an outfit and bundle !