You can purchase this as a set or individually. The fabric is a cotton knit blend, a heavy weight casual fabric. The sizes are both flexible sizing, the shrug is roomy- a medium or large, with longer than average sleeves to keep the wrists comfy. The Mini Hip Hugger is an Ashner Medium, but it is a stretch and ties on the side, so would be fine for S/M, or M/L.
I do have more of this fabric if you need a smaller or larger size, or need one to send to your buddy so you match! Just send me a note, I would be happy to help out.
I recommend washing gentle and hang to dry.