Question: what is the standard size of upper kitchen cabinets?
Answer: Typical Kitchen Cabinet Dimensions Base cabinets - typically 24" deep (also 12", 15", 18") and 34 1/2" tall (countertops add 1 1/2" to make the finished height 36"). Upper/Wall cabinets - mostly 12" deep (also 15", 18", 24") and 12", 15", 18", 24", 30 " (typical), 36", 42" tall.