The box is a great size for travel as advertised (95mm/55mm), you can open and close the sliding cover to keep sharps safe but beware that the opening is 11mm/1mm at the widest part, so my needles, with the safety cap, don’t fit. That makes this product of no use for users of the GlucoRx Fine Point Insulin Pen Needles 4mm/31G which is a shame, I would recommend measuring your disposable sharps before buying.