I ordered led bulbs in 3156 size, which I thought was the correct size, but they are way too small? What is the correct size bulbs for 2006?

http://www.carid.com/2006-ford-f-150...-25660671.html

I purchased the plazma 420 lumens in 3156 but they didn't fit.

 

Well those are the right size according to Sylvania... but I am wondering if they were made funny. Both the 3156 Single and 3157 Dual works... the code for the LED equivalent is T25.

AFAIK though the LED's to replace the tail lights etc won't work due to the type of bulb. I heard they flicker and whatnot if used...