What size speaker does my truck have on the dash?

Question

i have an 81 chevrolet pickup, what size is the midde and the two speakers on the sides?

Answer 1

Front speakers

Dash: 3-1/2"

Kick Panel: 6-1/2"

Front Door: 6x9" Important requirements

Far rear speakers

Behind Seat: 4x10"

Answer 2

81 Chevy pickup.  I'm guessing its the Fullsize Pickup C10?

If so, front speakers are 3.5".

Answer 3

middle is a 4x6 sides on the dash are 4.5

Answer 4

If I'm not mistaken, The side speakers are 3 1/2" and the center speaker is either a 4x10 or an odd shaped 5x7. It's been a while since I have worked on one, but I know the side ones are 3 1/2.