Translation guide
The English word 'miniskirt' refers to a very short skirt. In Japanese, the most common and natural way to say this is ミニスカート, often shortened to ミニスカ in casual speech. There are also a few native Japanese terms, but they are less common.
The learner wants to refer to a miniskirt in general, in conversation or writing.
The standard loanword from English. Used in all contexts, from casual to formal. Safe and natural choice.
She is wearing a red miniskirt.
How much is this miniskirt?
A common abbreviation of ミニスカート. Very natural in casual conversation, but slightly informal. Avoid in very formal writing.
I went out in a miniskirt today.
Means 'super miniskirt' or 'extremely short miniskirt'. Used for emphasis when the skirt is very short.
She likes super short miniskirts.
Literally 'short skirt'. This is a descriptive phrase, not a specific term for 'miniskirt'. It can be used when you want to avoid the loanword, but it sounds less natural as a direct equivalent.
This is not a standard term for 'miniskirt' and may sound like you are just describing any short skirt, not necessarily a fashion item.
Short skirts are in fashion.
In casual conversation, ミニスカ is more common than the full ミニスカート. You can use it with verbs like はく (to wear on the lower body) or 着る (to wear on the upper body, but for skirts はく is correct).