Taper Design:11.5mm/12.5mm/13mm carbon fiber pool cue stick shaft:Pro taper,progressive taper with a gradual taper in the front section for enhanced stability, and a rapid narrowing in the rear section for increased flexibility,these tip sizes carbon fiber cues are suitable for pool player.10.5mm carbon fiber pool stick shaft:Conical taper,this is suitable for snooker cue.If you are a beginner,you can choose the bigger tip to be your first cue,like 13mm or 12.5mm,if you are a professional player and accustomed to using more techniques,11.5mm or 10.5mm is more suitable for you.by the way,if you play snooker cue,choose the 10.5mm tip size directly.