I ended up trying four sizes of hook.  First my favourite is the 8mm aluminium It gave a firm texture, which would be fine for a rug or placemat.

Second is a 10mm hook.  The texture if this is coming out feeling good, not too tight with a bit of flexibility. 

The third one is a 12mm knooking hook. The texture of this initially came out feeling very soft, but a bit loose and slabbery.  However, as I carried on, my tension evened out and become tighter.  Hence the fourth hook.

The fourth hook is a 15mm.  I liked the result I got from this best of all.

So here are my stitch and row counts from a 10 x 10cm square (4″ x 4″) for the four hooks, and photos in a gallery for you.

8mm hook –     8 stitches, 10 rows

10mm hook –   8 stitches, 8 rows

12mm hook –   7 stitches, 9 rows

15mm hook –  7 stitches, 7 rows.

In searching for a project to use this yarn for I found a crochet version of Claire’s Outland Cowl on Ravelry. I rather like this.

The link for it is here.

https://www.ravelry.com/patterns/library/outlander-claires-cowl-crocheted