Lace weight can in general be either be 1 or 2 ply and knitted or crocheted on 2mm to 3.5mm needles or hook. Used for delicate lace knitting and intricate work, fab for lightweight garments, shawls, gloves and superfine socks.
Lace weight yarns can often be used two stands together and up sizing your needle or hook. This method will bring the weight of the yarn up to more of a 4ply, either single colour or using two different colourway combinations to create a marled effect or combining one strand of merino lace with one strand of kid mohair. It is advisable to do a 10cm x 10cm square so that the needle size or hook can be adjusted. We all knit and crochet differently, some of us work quiet tightly and others work quiet loosely, so size of needles or hook used is important to achieve correct tension for best results.