The M2M Gold Service SIMs are the Combi SIM Card. Silver and Bronze Service SIMs are the Standard (Mini) SIM Card. The combi SIM and standard sim are used in most phones.
If you require a micro or a nano sim you will need to contact our sales team to arrange a special order.
Micro sim is for an iPhone 4 / 4S, the Samsung Galaxy range plus certain new Nokia, HTC and Sony smartphones. Nano sims are currently only used in an iPhone 5.