What a great vintage full slip!  It is by Lorraine Lingerie and is tagged a size 34.  The bodice and hemline are trimmed with gorgeous scalloped lace. It is in excellent condition, no holes or stains.  It doesn't appear to have been worn or laundered much, if at all. The tag is very crisp & clear.

Underarm to Underarm 161/2" (37" total)
Length shoulder to hem 32"  and it will go longer or shorter with the adjustable straps

Shipping is $3.75