Weight of roving required?

[feeshy]

I've tried to look this up but haven't found any answers as of yet. How much roving is required to make stuff? To be specific-

I'll be buying 23 micron merino.

What I am considering making-

1. A wet felted waistcoat, for a medium-large lady

2. Felt scale armour. This is entirely experimental, but I'm going to be making sheets of different colours, cutting out the scales and attaching them to a backing. I hope it will be a tabbard style of about mid-thigh length, so maybe enough to make a medium thickness sheet of about 1.5m x 50cm?

Unfortunately, all the tutorials I've seen for things go along the 'some' line of measurement, which isn't helpful when you want to do one online order and have everything you need.

Thanks!

[Belladune]

If you've got some of the wool, I would do a sample swatch (or 2 or 3) and ffelt it as thick as you would like your coat to be.  Make it as square as possible.  Measure it, both in weight and area, and then measure the final dimensions of your coat (make each piece "square" in your head, it adds room for error when you are going to purchase a lot of wool)  If your final swatch piece measures 4inchx4inch say, and you need 4feetx4feet to fit all your pattern pieces in, and your sample weighs 1 ounce,  then you would need 36 pieces to fill the space  then you would need 36 ounces of wool (my math might be off. I'm doing it in my head, and it's not my forte.)    Do you see what I mean?  You measurements will of course be different, and you'd have to tweak the measurements for the second piece, but that's one good way to determine the amount of material that you will need.  I know it's not straight up you need x ounces/pounds,  but you'll get the most accurate measure this way.