Stealth based on size

[Srtz]

Forgive me for the random ass question, but if anyone can answer it, i know itd be you wonderful people. THANKS

Goblins get +4 stealth due to size on top of the other bonus +4 to stealth for a total of +8.. Well i was wondering if im playing a Synthesist Summoner, and my Eidolon that im FUSED WITH is medium size or bigger, do i LOSE the size bonus when determining a stealth skill check?

[Dafydd]

Yes, your size changes when inside the eidolon.

This effects your stealth and your fly checks, as well as determining how small a person can be, and can still trip you. In addition, you lose the +1 size bonus to AC and Attacks and the -1 to CMB and CMD.

[KahnyaGnorc]

This page has a table showing how size affects various other aspects.