WWI German Naval Gun Turret Markings

Have been asked multiple times for to create these. I finally gave in. There are 12 different sized circles on each sheet.  I lost count of how many total circles on the sheet but it’s a lot.
 
Caveat emptor: 
WWI is not my gig. I do not have any WWI ships to scale the decals to. I took a best guess based on WWII turrets.  
As in the picture, many WWI turrets had protrusions on top. The decals will not work on such turrets.
As a reminder, the decals need to be individually cut out. If the turret has a protrusion in the center, you will need to cut out a portion of the clear center of the white ring as well.