Nearly all hotel rooms in the United States have some type of tub in their bathroom. In general, the standard size of these are 5 foot long.
"Standard tub" is too vague. More information is needed, especially what the 'tub' is used for? Tub of icecream? Tub of lard? Bathtub? etc.
The standard size of the nut used on a bike's rear axle is typically 15mm.
The size of a Standard video file depends on the size of the media used to create it.
The standard pedal thread size used in most bicycles is 9/16 inch.
The standard dowel size used for assembling furniture is typically 1/4 inch in diameter.
The standard check size used for most printed checks is 6 inches by 2.75 inches.
The standard size of a Schrader valve used in most bicycle tires is 8mm in diameter.
The standard size business letter is called a #10envelope.
What is the standard channel size used by both cable and wireless modems?Read more: What_is_the_standard_channel_size_used_by_both_cable_and_wireless_modems
The maximum ceiling drywall size that can be used for a standard room is typically 4 feet by 12 feet.
The standard unit of measurement used for determining the size of a tile is typically in square inches or square centimeters.
The standard M3 bolt size is commonly used for securing components in electronic devices.