I own the new Sony Z walkman, which has a very neat micro HDMI out (known as Type D). Firstly, I bought Type A (male) to A, then cancelled the order, when checking my TV's HDMI input - 3x the size of the walkman's.
Mistake 2: I then bought a "mini" HDMI, (known as Type C!) which is between A and D in size. Luckily, Amazon allows easy cancellation of orders and finally I found this, the correct cable! Came next day and is literally plug and play - so easy - and the picture of my AVI/MP4s is terrific, played in full mode. Very satisfied!