hefty vs sizable

hefty and sizable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
hefty	No	Yes	No	No
sizable	No	Yes	No	No

As adjectives, hefty and sizable are synonyms defined as:

Other synonyms of hefty include goodish, goodly, healthy, respectable, sizeable, tidy.

hefty (adjective)	sizable (adjective)
large in amount or extent or degree	large in amount or extent or degree
of considerable weight and size	fairly large in size
(of a person) possessing physical strength and weight; rugged and powerful