If he looks a normal weight ( doesn't look to skinny or fat) he is most likely fine.... Don't worry about the breed standard, every dog is different.
Do you have a birds eye view of him? That would help us know if he was under/over weight.
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Jaxx- german shepherd, born november 11th 2012
"i approached a kid and asked, what is love?
he replied, love is when a puppy licks your face.
i laughed but then he said, even after you left him alone all day..."