[AndyS]

The commission annually stocks about 3.15 million adult trout in 720 streams and 126 lakes open to public fishing. That includes about 2 million rainbow trout, 640,000 brown trout and 500,000 brook trout.
The average size of the trout produced for stocking is 11 inches in length.

Trophy golden rainbow:
In addition to the 11-inch trout, which are the bulk of the commission’s stocking, about 8,700 trophy golden rainbow trout, weighing about 1.5 pounds and measuring at least 14 inches each, will be stocked.
Additional trout

In addition to the fish stocked by the commission, cooperative nurseries run by sportsmen’s clubs across the state will stock another 1 million trout to waters open to the public.

What's the limit?
The daily limit is 5 trout, each at least 7 inches long, March 31-April 13 in the regional-opening-day area in southeastern Pennsylvania and April 14-September 3 statewide. The limit is reduced to 3 in the extended season on most stocked waters September 4-February 28, and to no harvest on Class A streams.