Answering question for Pickup - Gretsch, FilterTron, nickel

Product:
Pickup - Gretsch, FilterTron, nickel

Question:
I see different numbers for the width of the pickup, on this page it says both 2.79" and 2.75" and I found a 2.80" on another website. It sounds silly, but I can make this work with 2.77" or less. Could you get an accurate width for me?