Model No. / Depth of Cup / Approx. Cup Dia. / Rim Shape / Description 3 / Medium deep / 26.26 mm / Medium wide, well rounded. / Extra-large cup for players with a robust embouchure. 4 / Medium / 26.00 mm / Medium wide, well rounded. / Very large cup; principally used by players having healthy, strong embouchures. 4C / Medium shallow / 25.75 mm / Medium wide, well rounded. / Large cup with a brilliant tone. Requires a powerful, natural embouchure. 5 / Medium / 25.50 mm / Medium wide, semi-flat. /