John,
I just went and looked and there is no part number or skew number on the cards of birds. Just marked at $1.99. So the measurements are:
Red birds are 6 to a card and 1 inch long, just right.
Brown birds are 4 to a card and 1 3/8 inches long. In my opinion they are too big for most of my size houses, so I tried to only use them only on the biggest houses.
Blue bird with orange breast, 4 to a card, 1 1/16 inch long, again, just right.
The littlest one, green head and orange breast, is ¾ inch long. Too small for most of my houses, so only used then on the smallest houses.
These are the ones from Hobby Lobby. The ones from Michael’s are 4 to a pack and 1 1/16 inch long.
Hope that helps.
If you can't fix it with a hammer, you've got an electrical problem