My Juki HZL 600 (same machine, just more stitches) has exactly 8 inches from the centre needle hole to the right but the height space is curved so that the overall harp space is not nearly as large as my Juki TL 98Q which has a rectangular harp space. I do know that my Juki HZL 600 has more throat space than my old Bernina 830 Record and I managed to stuff Queen sized quilts through it.