Thank you all for helping me think. While the shirt is still beautiful [esp the lacy knit] it has lost a lot of it`s original color, luckily it faded all over in the same degree, but even if i could find the original thread [from 20+ years ago !!], it won`t be much help. The main dammage is the frayed under edge. as well as having lost the elasticity of the hem. I am not sure if ripping only the hem and reknitting it would work well , as it has been washed a lot and i am not sure how this kind of cotton will react /behave ,,, Thus i think i will take with me to the shop and look at the threads available and than decide,,, Lately i have finnished several knits with a lacy edge ??? i might go there , i will let you all know what i decided ,, mirjam