The Cardiosport FP3 is a soft elasticated heart rate strap with polymer electrodes integrated into the strap giving maximum performance and comfort. The adaptive polymer electrodes pick up your heart's electrical signal with 99.4% accuracy in all conditions. The standard strap is fully adjustable and can fit to all sizes from Small to X Large. There is also the X small option for those with a slim stature and often find heart rate chest straps to be too large. 
 
(Heart Rate Monitor Not Included)
 
X Small strap size ranges from:
30" - 42" (76 - 106cm) chest when fully stretched on largest adjustment 
12.5- 17" (31 - 43cm) not stretched on smallest adjustment.  
 
The snap on connection poppers are a compatible with most popular hear rate transmitter prods including: Cardiosport TP3, TP5, Wahoo TICKR, Sigma Duo, Peloton, Stages, Kalenji and many more.