Thanks for the welcome! Its a wet piece (i've only just found out about needle felting!) Its not very dense and it's a bit patchy in places. it ranges from 2mm to 4mm where i built it up on the paisleys.
I don't think it would hang well on it's own so I was considering mounting it on a larger piece to give it a border. Although i do really like your idea of sandwiching it between plexiglass!!
Thanks once again.