That depends on what kind of object. For example, a case of wine is 12 bottles, but a case of beer is 24 cans, and there are several other.
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Items that are less than 30 centimeters include a standard smartphone, a cereal box, a medium-sized book, and a DVD case. Common kitchen utensils like a measuring cup or a standard dinner plate also fall within this size range. Many small household items, such as a coffee mug or a desk organizer, are typically under 30 centimeters as well.
14 cases. The 14th case would not be full.
Four, in each case.
The standard size of a pillow case is 21"x30".
either 6 or 12 if they are standard 750ml bottles.
all principal end items and secondary items
The standard meter of fabric used in the production of clothing items is typically 1.5 meters.
the standard is proof beyond a reasonable doubt
You'd need 14 cases, one of which would not be full.
Ironically, the phrase "standard form" is not standard! In the UK, standard form is generally taken to refer to the scientific form. In that case, there are nine numbers: 1 to 9.