Here are the regulation sizes.
* Chickens - 1” tall by 1” wide, pistol at 10 yds. rifle at 20 yds.
* Pigs - 1.5” tall by 2” wide, pistol at 12.5 yds, rifle at 30 yds
* Turkeys - 2” tall by 1.5” wide, pistol at 15 yds, rifle at 36 yards
* Rams - 2” tall by 3” wide, pistol at 18 yds, rifle at 40 yds
My only complaint is that I have to stop shooting and walk down to the silhouettes and set them up, again. Sometimes they really go flying so I have to do some searching for them.
There are some silhouette swinger targets on the market that eliminate the need to stop shooting and reset, though. The problem is that most of them are larger than regulation size AND all targets are on the same swinger assembly, so you have to set all of them at a single distance.
Recently, though, I bought regulation (1/10 scale) silhouette swinger targets. https://www.qualitytargets.com makes a nice set and they are regulation size, not the much more common 1/7 or 1/5 scales, plus each target is an individual swinger, so you can set each target at its regulation distance. I'll set this first set at regulation pistol distances and probably buy a second set to make up an air rifle silhouette backyard range.

Let the fun begin.