Hi ajay... take a few bits from different areas rather than taking a ``big lump`` of hair from one spot ......it doesn`t have to be very long... maybe an inch ? Try to get enough to send in a clump about the diameter of a pencil, and hold it together with a small elastic band.As to the size of template... your crown area looks like it`s OK from there down to the nape of the neck ...usually the actual crown area is where the hair direction changes......so the hair down the back grows downwards from there and the hair to the front grows forward from the crown.... your template will be a wedge-shape by the look of it.....I`d just go back as far as the crown point and no further...... it would be a good idea to enclose your pics with your template ..that side view gives a good impression of the way your hair is growing... it will help the factory to ventilate the hair at the crown there into the correct direction to give you a good blend-in. A picture paints a thousand words as they say ! In fact, I could recommend to anyone who is unsure of what they should order, just pop in a few pics of your present condition, and a pic or two [lifted from a magazine etc. ] of the style you`d like to achieve, and it will help greatly and result in you being happy with the system once it arrives.......we`re all `fussy` about how our system will look and to be fair to the makers, they make thousands of systems and are not in a position to do a one-on-one consultation with potential wearers, so the next best thing are a few good pics to work off..... hope that`s of help -- Paul.