I started collecting materials months ago, but made the costume in 3 weeks starting over New Year's Eve weekend. It was a very fast build, especially with rubber materials that take 16+ hours to cure. Each test piece, each mold, each cast needed enough time to dry and cure, so I made the costume around the armor building, using the down time in between to sew. 
I want to write up a proper detailed construction note when I release all the photos from the shoot and make a gallery for my website. For now here is a breakdown of materials:

• Armor made from plastic (chest piece & shoulders) and urethane rubber (abdomen)

• Undersuit made from a shiny and a matte stretch pleather

• Cape made from matching black and gold pleather, with lead cape weights

• Gauntlets made with Worbla & foam, covered in the same gold pleather I made the gloves out of

• Boots used to be thigh high boots, I altered them severely. A note about the high heels: yes I know they are not accurate. BUT I am so short and the costume is so padded out with the armor and pleathers that I need some help on the height front to pull off that look.  :)

• Belt made from gold-powdered urethane rubber

Costume made from scratch by Yaya Han
Armor designed by Yaya, made with guidance and help from Brian Boling.
Batgirl cowl kindly provided by the magical Reevzfx!!