The little chevron is about 5/8 inch (17mm) wide x 7/8 inch (23mm) tall.
The chain is 21 inches long, but can be made up to 2 inches shorter or longer at no additional charge. I can also replace the double hook clasp with a brass lobster clasp (just keep in mind that this will make the necklace as a whole a little bit shorter).
Matching earrings also available!: http://www.etsy.com/listing/70916375/vintage-brass-chevron