Here are some of the standard table leg heights:
Coffee table or bench - 16.5"
Desk or dining table - 28"
Counter - 34"
Here are some of the standard table leg widths:
Coffee table - 16" - 32"
Bench - 10" - 16"
Desk - 24" - 28"
Dining table - 28" - 32"
Counter - 24"