The standard bookcase width typically used in most homes is around 31.5 inches to 36 inches.
72 inchs would be the mean height for the average bookcase.The mean depth for and given bookcase would be 12 inchs. The mean width of any given bookcase would be 30 inch.
The average bookshelf width typically found in homes is around 30 to 36 inches.
The standard width of a refrigerator is typically around 30 to 36 inches.
The standard width of a bookshelf is typically around 31 to 36 inches.
The standard width of a bathtub is typically around 30 to 32 inches.
The standard width of a fridge is typically around 30 to 36 inches.
The standard treadmill belt width is typically around 20 inches.
The standard width of a treadmill belt is typically around 20 inches.
The standard width of a shower curb is typically around 4 inches.
Standard window measurements for residential homes typically range from 24 to 48 inches in width and 36 to 72 inches in height. These measurements can vary depending on the specific window style and the preferences of the homeowner.
The short Billy bookcase from IKEA typically has dimensions of 41 3/4 inches in height, 31 1/2 inches in width, and 11 inches in depth.
What standard did you have in mind? In N. America, they can be up to 102" wide.