ninetyish
/ˈnʌɪntɪɪʃ/adjective
1Of, belonging to, or characteristic of the 1890s; resembling or recalling the fashions, etc., of that period.
2Of about ninety (in age, measurement, etc.).
Origin
Early 20th century; earliest use found in The Westminster Gazette. From ninety or ninety + -ish.