I purchased a pair of pants before pesach but didn’t wear them over pesach. Can I wear them now during sefira?
Yes. There is no problem with wearing a new pair of pants during sefira. Most poskim say that it is permitted to wear something new even if one would say shehechiyanu, as sefira is not like the three weeks. Even for those who would abstain from making a sheciyanu during sefira it is permitted, since we don’t make a shechiyanu on a new pair of pants.