Thanks for the tip, SNK... you got me to the right church, I just had to find the right pew myself. Turns out the sizing margin of the button itself affects the height. Not the content margins, but the sizing margin. Still experimenting, but Using the KewkHoE skin for example with Google Toolbar. Content margins 0,0,0,0 and Sizing Margins were like L4,R10,T12,B10. changed those visually to just include button edges to L3,R3,T3,B4 and left the cointent margins alone and voila! The size of the bar dropped by 16 pixels and the Google toolbar lined up perfectly. Thanks for the help, buddy!