Rex Pauldron Measurements?

I am trying to throw together a quick and easy pauldron for halloween. There are some fantastic scratch mades floating around here but I can't seem to find one with any kind of rough estimates on measurements. I tried to draw it out and free hand it but I can't seem to get the size right and it's giving me fits. Anyone know where I can find a picture with some scale?

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I am starting my armor soon and looking for a pattern for the pauldron. Do you know anyone that might have one?