The Nero Stitch is designed to meet the updated FINA regulations for the 12 and under age group that prohibits woven and bonded or taped suits. It offers compression in all the right places in order to improve your body position and decrease resistance, resulting in more speed. Note: The Stitch was designed to comply with FINA's 12&U tech suit rules. The Blueseventy logo is legal for all US Swimming competitions, but is considered too large by US High School Swimming. Size 12: 4'9"-5'1" 75-89 lbs. Size 14: 4'11"-5'3" 90-104 lbs Experienced competitive swimmers who want a tighter fitting suit should size down.