Can't find any sights. Even DP lists different sizes
My dovetail measure .200 at the base and depth of .070
It's a LDA sight cut for the front and rear sights, and many sight manufacturers have sights that will fit this cut.
As for height for the front, it all depends on the height of the rear sight. As for the blade width, it too depends on the rear sight notch width, and if you want daylight between the front blade and the rear blades when sighting the pistol or not.
Since you mentioned Dawson,
The first three sights are all about the height that you want (.185 tall) for the rear adjustable LDA sight. The first of .090 will give you a great deal of day light between the front bade and the rear sight blade. The last of the three first units (.125) will fill up the rear slot when viewed.
Really, it all depends on what you will using the pistol for that will dictate the blade width. If for a race gun, then you want the .090. Here you are just tagging targets fast, and really just putting the dot on the target and going at it (read shooting fast).
If you are more precision target shooting, then you want the widest of the blades since you have much more time to align the sights before taking the shot.
The .100 is a mix of the two, and may be one you like instead of the .090 to close up some of the day light between the front sight blade and rear notch.
As for the reason for daylight between the blade/notch, when moving fast, you know that the pistol is on target roughly, and as long as there is daylight between such (centered being nicer), most of the targets you shoot will put the shot in the A zone (if you do your part).
I actually meant the dovetail dimensions. I sent my slide to Gans to have an EGW Kimber fiber optic sight installed and new dovetail cut. I went with the .200H x .125W
Our Rear Sight Dovetail on all models is Standard 0.375" 30 degrees
Our Front Sight Dovetail on all models is Standard 0.250" 20 degrees