Fit adjectives are listed in this post. Each word below can often be found in front of the noun fit in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing FIT.
acceptable, accurate, adequate, ague, angry, apoplectic, appropriate, awkward, bad, best, better, brief, close, closest, cold, comfortable, conniption, convulsive, correct, cultural, dangerous, deep
desperate, drunken, earth, easy, epileptic, everything, exact, excellent, fainting, final, first, fresh, furious, good, great, hearty, hissy, hot, hysteric, hysterical, ideal, ill
immoderate, imperfect, individual, ita, jealous, key, last, least, less, linear, little, long, longer, loose, loud, mad, melancholy, model, momentary, more, most, much
natural, neat, nervous, new, next, nice, nihil, non, occasional, odd, only, optimal, organizational, overall, own, passionate, peculiarly, perfect, polynomial, poor, possible, potential
precise, present, pretty, proper, quo, re, real, reasonable, regular, right, same, satisfactory, scarce, screaming, second, severe, sharp, shit, short, similar, slight, sneezing
snug, strange, strategic, strong, subject, sudden, sulky, temporary, terrible, tight, tighter, transient, uncontrollable, uniform, unusual, violent, wild
Hope this word list had the adjective used with fit you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.