30cm x 15cm (12″×6″) rectangle frame for 520 (20 1/4") needle spacing Barudan machines that have QS silver arms (clips have round and oval peg cutouts). Common uses: hoop may be used 30 cm wide &15 cm deep or 15 cm wide & 30 cm deep – ideal for long narrow designs on bags, sleeves, pant leg or shirt yoke.