Ain R Jr Vintage 1960’s Mod Style Pink Button Up Dress

I LOVE THIS DRESS! But it’s a little too small for me, specifically on the arms it’s restrictive. This would fit a small or extra small best!! This is true vintage I would guess it’s from the 1960’s, the material is mixed. There is a lining that’s probably polyester, the outside material is itchy maybe a wool blend The lining looks to have been restitched to the outer shell, it looks like the lining sticks out a little bit