The rule is easy to remember. To know whether the noun X that follows sans is singular or plural, it suffices to ask whether, if there was any X, there would be one or more.So, for example, we should say ..

We often see mistakes in the binary units in French, for example, things such as:

When used as an adjective, “standard” does not take the plural “s”, whereas it takes it when used as a noun. The reason is that “standard” has been borrowed from the English language.

For some strange reason, the “starting point” of plural is different in different languages.

In English, plural starts “right after 1”, but in French it only starts at 2.

So we should say “1,99 mètre” but “2 mètres”.