Chronic myeloid leukemia (CML) is a rare type of blood cancer and occurs when the bone marrow makes too many of one type of white blood cell, called myeloid cells. Almost all CML cases are caused by an abnormal chromosome called the Philadelphia chromosome.
These are new 18X24 Quality Picture Mats. The Openings are Bevel cut 12.5 x 18.5 to fit a 13X19 photo or print. These mats are cut from Quality white core mat board and are excellent for framing photos or prints.
If your opening measures 18â wide and 24â high, you need an 18x24 mat and 18x24 piece of glass. Ordering a mat for a picture you have. To determine what size frame and mat you should get for a picture depends a number of things. Don't go with too small of a mat.  Don't go with too small of a mat! Yes, we meant to say that three times! Depending on your picture size, a 2 - 3 inch mat (i.e. mat border on each side) is what we would consider a minimum mat but you can go bigger.