Ring clips in ABS plactic, in linen,  are sold per 8 pcs just as robust as the metal ring clips it can even be attached on a thick fabric. Easy to install, no advanced equipment is needed only a good pair of sciccors. Always use an even number of ring clips so that both sides of the curtain is in the same way. The distance between the eyelets, Centre-Centre, can range from 15 to 20 cm, the greather the distance, the more pleats there will be formed, when open, they will be large and therefore ther the bar should be from the wall. To have a more beautiful curtain head, it is possible to put a reinforcing cloth inside the top hem.