This size is most suitable for carrying insulin and pens for long stay trips or expeditions. Will hold: a) 8 x Insulin Injector disposable pens OR b) 20 cartridges (3ml or 1.5ml) OR c) 8 x 10ml vials (bottles). OR d) 3 x innolet injectors NB: if you have a Saline or Humapen, then may only hold 6-7 pens due to thickness of pen. Inner Wallet Dimensions: 155mm x 210mm (8.5" x 6.5" approx) Contents Not Included