Change size of the font in TextView Inside of an Adapter Partially

Change size of the font in TextView Inside of an Adapter Partially

I wanted to add three dots after each row inside of a ListView , then i
wanted to make that dots a bit bigger than it's column Size(i don't want
to change the whole TextView Size) so i've tried Html.fromHtml() like
below :
holder.productName.setText(item.ProductName + Html.fromHtml("<font
size='20'>" + " ... " + "</font>"));
This code adds three dots fine but nothings gonna change in my List when i
change the font size, any help would be Appreciated.