Please read the description below carefully, there is much confusion about what these connectors are called!
They are often mis-described as "JST 1.25 PH" connectors.  What they actually are is:

1 Pair Molex MicroBlade 1.25mm 2-Pin Male&Female Connector Plug With 80mm Wires Cables UK Stock

See the 1st Photo for exact dimensions.  If you are unsure what these are, see the helpful resources at the end of the listing.

This item is for ONE Male and ONE Female connector, with 80mm wires attached.
  • 100% brand new and high quality
  • Molex Microblade 1.25mm 2 Pin Female connector with 80mm standard wires
  • Molex Microblade 1.25mm 2 Pin Male connector with 80mm standard wires
  • 1.25mm separation distance of the pins (Pin Pitch)
  • Wire specification: 1571#28
  • Wire Core: 7 Section 0.11mm Zinc Copper, external diameter 0.9mm, tail zinc coated: 2mm
  • Overall socket size is 4mm x 3mm x 8mm front to back. 
This item is for ONE Male and ONE Female connector, with 80mm wires attached.

Great for DelTang, LemonRC, Hobby King Micro, FlyDream, Walkera and other small batteries, quadcopters, toy or small wearable Arduino projects or anywhere where a tiny 2-pin connector is needed.

Second Class postage within the UK is included in this price. Shipped from the UK the same day, only 10p extra for first class post! Order more than 1 set for automatic upgrade to first class.

These Molex Microblade connectors are very often mis-labelled as "JST PH connectors".  The 'PH' refers to 2.0mm pin pitch.  These are 1.25mm pin pitch, like "JST GH connectors". They are called Microblade because the pins are in the shape of a blade, not square or circular.

For more details, see these sites:
http://www.micronwings.com/HintsAndTips/RCConnecorTypes/Molex3P/index.shtml
https://www.rcgroups.com/forums/showthread.php?t=1493712