It might sound crazy but an adult rat can fit through a 1/2 inch space! I don't think a 1/2 x 1/2 hole, but definitely a horizontal space that tall. Hope this helped!
as big or bigger than the radius of a football
PS The previous awswer is,as far as I'm aware,100% wrong.
yes and no depends on size of hole :]
A.3 centimeters
Cats have whiskers because they help them tell how wide an opening or a hole is because their whiskers are the same size as their shoulders.It works like this:The cat finds an opening/hole and does not know whether he/she can fit through it so he/she put her whiskers through the opening/hole and if her whiskers get squished up he/she knows she cannot fit through. also, with wiskers a cat can remember its way around because they will know what hole they shoved there wiskers through and then they will be able to remember that they have gone the wrong way if they come across a hole or gap that they cannot fit through because then how can they possibly have got there?
8 inch sub
If the ferrets head will fit into the hole, then the rest of their body can go through the hole
No, the skull is too big.
Yes, the peg will have a diameter of 0.955 inches which would allow it to fit in the hole.
not legally (nec)
The only requirement for the size of the holes in your beads is that the holes must be large enough that the string (or wire) that you are using can fit through the holes. Other than that, the holes (or beads) can be any size you like.