Vintage 1960s Simplicity 5789 JR Petite Dress with Collar Sewing Pattern

Vintage size 5 Junior Petite (designed for those 5’1” and under)

Estimated modern XXS Petite / 00 Petite - but please look at measurements shown in photo of back of envelope to confirm

This appears to be uncut and unused with instructions intact. There is wear to the envelope (including writing on envelope).