Is there a neat word or phrase that summarizes the opposite of "one size fits all"? "One size does not fit all" is not an option. What am looking for is something that means "different sizes for anybody, for every occasion etc.".
Here are a couple possible opposites:
- "Made to order" — the product is customized each time to a new specification. This is the extreme opposite.
- "Available in a variety of sizes" — there are several sizes available for the given product.
This may be venturing away from English usage and into slogans, but maybe you could write "Our Sizes Fit All"? Realistically, it might be best to specify which sizes instead of groping for a single generic word to say "various sizes," although that phrase might work.
You could call it "sized" clothing, however it's much more common to use the word in a combination: an average-sized insect, an awkwardly sized package.
Implementation of software solutions are typically context specific. The implementation depends on the amount of data used, hardware available, the business user's priorities, the level of ability of the users etc.
There are a couple of idioms which cover the basic idea that everyone's needs or wants are not identical:
Horses for courses
To each his own
The adjectives/adjectival phrases custom, customized, fitted, tailor-made, individually made, configurable and unique-fit also exist.