Smiley, keep everything tight and tidy around the lower legs. Snagging crampons on clothes is as you know costly, but also dangerous should you trip and fall, etc.
Heavier material on the instep side of the pant leg will help as well on both pants and gaiters. Whatever fashion statement works for you, but nothing baggy and loose. Tight is right, but not so much so as to cut circulation or restrict movement.
Until you get used to walking about in crampons, you might try walking with a wider stance as well.