H&M + Richard Allen midi dress, retro 60s

Size 14 Sleeve width is 12". They are elbow length/lower arm-ish. Length of dress from the shoulder is 35" Rayon-type washable fabric Two buttons fasten the dress at the back of the collar, and they have elastic holds. Dress is very dark brown with light brown and cream pattern I have tights that match this print but need to find them to list them together. Fabric is lightweight. Dress cut has a nice flow.