Maybe this will help since I can't post the link.
SIGHT CHART
I have put together a chart (below) showing rear and front sight heights (for most models)in metric and English units. It is important to note that the height is OVERALL from bottom of dovetail to top of blade; it is NOT just the blade height. Looks like the base is about .055-.060" which, when subtracted yields just the blade height but for calculating point of impact/aim, the DIFFERENCE is what is important because the base height is constant. ED
SIGHT MEASUREMENTS
Models: P220, P225, P226, P228, P229, P239, P245, SP2009, SP2340
REAR/ FRONT
#5 5.52 mm (.217")/ #5 6.01 mm (.237")
#6 5.80 mm (.228")/ #6 5.88 mm (.231")
#7 6.07 mm (.239")/ #7 5.74 mm (.226")
#8 6.35 mm (.250")/ #8 5.60 mm (.220")
#9 6.62 mm (.261")/ #9 5.46 mm (.215")
#10 6.90 mm (.272")/ #10 Not Available