I have a pair of the herm sprenger bow balance stirrups.. they're blue in color. Anyways, i'm thinking about showing and I wanted to know if those were acceptable in the show ring, or do I need to have regular stirrups?
Either way they're ok. There are almost no rules about stirrups. :)
Most shows will follow the rules of USEF, even if they aren't directly affiliated. So you can get always double check on their website. Go to USEF.org under Rules and Governance. Find your discipline and filter through the pages. :)