How do you verbally pronounce these sensor sizes?

[dragonballz]

1/2.8” half point eight inches?????

1/1.8”

1/1.2”

Etc etc

thank you

 

[tigerwillow1]

My way,
1 over 1 point 8
1 over 1 point 2

 

[samplenhold]

1/2.8" is 0.357"

1/1.8" is 0.555"

1/1.2" is 0.833"

 

[looktall]

fractions and decimals.
together at last.

 

[Mike A.]

I usually leave the 1 out as being implied and just say 2 point 8, 1 point 8, etc.