The "500" plaques are perfect on both sides. They measure approximately 3¾"W x 2½"H.

The "5000" plaque has some foil issues on one side. I scanned the worst side. The other side is almost perfect. It measures 5"W x 3½"H.

$10 each + $1.50 S&H (per order - not per plaque).

First link(s) to this post gets them.