1) Ample 2) Fairly big 3) Fairly large 4) Hefty 5) Large 6) Of considerable proportion 7) Pretty big 8) Significant 9) Sizeable Found on https://www.crosswordclues.com/clue/sizable
Siz'a·ble adjective 1. Of considerable size or bulk. 'A sizable volume.' Bp. Hurd. 2. Being of reasonable or suitable size; as, sizable timber; sizable bulk. Arbuthnot. Found on http://www.encyclo.co.uk/webster/S/111