New clothing during the 3 weeks

Is it allowed to wear new clothing during the 3 weeks. Is it allowed to buy clothing? Any difference if it’s a sale?

Now clothing until Rosh Chodesh Av is allowed. After Rosh Chodesh and during the 9 days, for Ashkenazim, brand new clothing are not allowed, and for Sephardim only during the week that Tisha bAv falls out (Shavua Shechal bo)

To purchase new Clothing but not to wear them would that be ok?(eg. Big sale , or boys going to yeshiva right after the 9 days)

Not allowed