Body has 8 repeats of lace motif. Test gauge for 1 motif, multiple by 8 times, you will have garment measurements at chest.

Change needles size and yarn to get gauge which give garment measurements at chest fit to your chest (plus ease as loose/ fit as you like).

Sample shows on picture was knitted in raccoon yarn with 3.75mm needles, on 84cm (chest) model.