Thank you! I thought all these years it was Ruger's most standard size by default, but I'd never confirmed it. Then I saw a poor photo in an adv and couldn't tell for sure. So I wanted to confirm I hadn't made a wrong assumption. I remembered being surprised when I first handled the Wrangler and discovered it had a different version of Ruger's free spin cylinder, and I began to wonder.
On all my old model and new model small frames I automatically swap their alloy grip frames to XR3 steel grip frames. But I'll probably never own a Wrangler anyway.