Normally, the ToolStrip wil autosize itself based on the button image
size and TextImageRelation property.

If you look through the property window for any given ToolStripButton
you have added, you will see the property,"TextImageRelation".  Try
ImageAboveText.

If you want a still larger ToolStrip, try a larger image or try
setting the ToolStrip MinimumHeigt property to some specific value
larger than it's current height..

When you arrive at the size you want, go to the ToolStrip BackColor
property, select the Web Tab, "Transparent" which will result in a
flat look ToolStrip.

Gene