Three Vintage Mexican Silver Thimbles

Description

The first two thimbles are marked HECHO IN MEXICO.  They are not marked for silver content that I can see, but they look and feel like sterling.
The third is marked ALPACA.
Each is a little over 1" tall.
The first has an edge of mother of pearl.  One piece may be chipped, or it may just have been made that way.  The inside diameter at the bottom is 11/16".
The second has a couple of dings from use and measures 7/8" inside diameter.
The third has an indented edge that was created when it was made (see second to last photo).  Inside diameter 7/8".
I don't see any markings for sizes and don't know how to find out.
Please examine photos.
Sold AS IS.