I had heard that this was an older shirt that Roseanne wore, just because it was something she had that was comfortable but her then husband Tom Arnold HATED it, so she decided to wear it all the time and as you say, there is even one episode when the whole cast wears it, plus it is on her apron when she works at the Lunchbox. Evidently all done just to tick Tom Arnold off!
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There is one episode where every character is seen wearing the chicken shirt once throughout the episode, hopefully someone has an answer for this From the way i understand it, when Roseann was married to Tom Arnold, he HATED this shirt and refused to let her wear it. After they divorced, Roseanne incorporated the shirt in every single episode either by wearing it, or having it appear in laundry, either hers or Jackies. In one of the later episodes about her yet unborn grandchild, she had the shirt put into a frame and hung in the house. Pretty cool!
An AC-DC T-shirt
Medium.
Jeans and a shirt.
Search for DaVinci bowling shirt and you'll find it.