https://www.youtube.com/channel/UCZzmfpYT-8g_lLiLopnXW7g?view_as=subscriber

my crosshair:
cl_crosshair_drawoutline 0;cl_crosshaircolor 1;cl_crosshairdot 0;cl_crosshairgap -1;cl_crosshairsize 2.5;cl_crosshairstyle 4;cl_crosshairthickness 0

This one is also good on a 4:3 resolution at 1280x960

cl_crosshair_drawoutline "1.000000";cl_crosshair_dynamic_maxdist_splitratio "0";cl_crosshair_dynamic_splitalpha_innermod "1";cl_crosshair_dynamic_splitalpha_outermod "1";cl_crosshair_dynamic_splitdist "8";cl_crosshair_outlinethickness "0.500000";cl_crosshair_sniper_show_normal_inaccuracy "0";cl_crosshair_sniper_width "1";cl_crosshair_t "0.000000";cl_crosshairalpha "300.000000";cl_crosshaircolor "5.000000";cl_crosshaircolor_b "255.000000";cl_crosshaircolor_g "235.000000";cl_crosshaircolor_r "0.000000";cl_crosshairdot "0.000000";cl_crosshairgap "-1.000000";cl_crosshairgap_useweaponvalue "0";cl_crosshairscale "0";cl_crosshairsize "4.500000";cl_crosshairstyle "4.000000";cl_crosshairthickness "1.000000";cl_crosshairusealpha "1";cl_fixedcrosshairgap "3"