Choose your letters one at a time and resize them individually. For instance the initials are B A T with T being the last name. You would make your letters BTA. You can choose the size to make the letters in the lettering menu on the machine. You may have to stitch each out as an individual design for placement purposes if you don't have software to combine them or your machine won't edit them ( mine doesn't) newer machines might be different than my old war horse.