Looking for an illustration of proper target height

The range I'm a board member of is having some issues regarding people placing their targets:
- Too high - resulting in rounds going over our berms
- Too low - resulting in rounds hitting the ground and skipping over our berms

I'm looking to the community here to see if they have a free to use illustration which shows both proper and improper height for targets so that rounds impact berms downrange. I'm thinking something as simple as a stick figure shooter with traced bullet path/impact.

We'll be using this illustration as the primary content for sings which will go up on the range showing proper and improper target height, so simple and black/white with strong contrasts would be ideal.

Thanks in advance for any help or pointers.

I agree there is no universal standard, what I'm getting at is that people need to look "through" their targets (regardless of shooting position) and see where their bullet is going to impact down range - then adjust height accordingly so that rounds are delivered into a berm rather than the ground where they can skip off range.

Cascade has an exhaustive guide for this per the link below, I'm looking for this type of instruction to be boiled down into a "target placement for dummies" type graphic which can be turned into a sign. I can clearly see this in my mind, but am a terrible graphic designer, so I came here seeing if anybody had an example to share.

http://cascadeshootingfacilities.org/Documents/proper_target_placement.pdf