Who's getting stronger and NOT bigger or even is losing muscular size ?

or who train for strength and don't become bigger ?

PLEASE post your training habbits (I mean sets per bodypart and , rep range and how many times you hit each muscle per week)

Since 4 month I do HIT, low volume (1 set per exercise, 6-10 reps, hit each muscle 1-2x per week) and high intensity, every set to failure. My strength increased a lot but I'm not bigger, nothing ! and I train for size (only).

for example when I was on a sort of GVT I did barbell curl and triceps extension with 25-28kg for 10x10 !!! Ridiculous weights isn't it ? and could curl ~8 reps with 39kg and less on triceps extension.

Since I do HIT my Curl went to 7x54kg and my extension to 16x39kg I nearly gained 15kg on my curl.... but arms are not bigger !!

the same thing for other lifts and others muscles !!!
I started HIT I was able to do 15 Pullups now I can do 7 with 25kg attached... but I'm not bigger

-------- If I continue with HIT.... I should say : if +15kg on my curl in not enough for bigger arms then I need to gain another 15kg.... maybe but............. maybe NOT !!!! maybe I could grow faster with light weights.....10x10...