The halocho of seeing something on underwear and as long as its less then a dime it’s not a issue is for white underwear during Shiva nkiim or only on colored underwear not during Shiva nkiim?
Answer:
During Shiva Nekiyim, on white garments, the size is about a dime or penny.
When a woman is wearing colored garments, even a stain larger than the above would not cause Niddah status. However if there is consistent or large staining, a Rav should be consulted in any event.
