Standard kitchen cabinets are 24″ deep (25-1/4″-26″ wide and 36″-42″ high), but base cabinets are available in a large range of widths.
To determine the maximum sink size for your base cabinet, measure the interior of your cabinet and subtract two to three inches from each dimension.
A 36″ base cabinet can handle a 33″ sink at most; a 30″ cabinet should be fitted with a sink no larger than 27″ wide. The average 24″ sink base cabinet comfortably accommodates a standard 22″x30″ sink; be sure to consider the depth of your sink when planning storage inside the base cabinet.