Likely from the late 1800's, Victorian Era.

Likely Handmade.

Excellent condition for age. No tears, no rips. I can see two very small stains on the front. Last two photos are of the marks.

Has a snap closure.

Color is more yellow/cream/ivory than white. Looks lighter in the photos. The photo on the model is a more accurate color.

Size.

12.25 inches overall length

5.75 inches length from neck opening to the bottom of the collar

8 inches wide