Czech seed beads in the shape of an oblong, also known as PRECIOSA Oblongs, are made by cutting oblong glass tubes with a round hole. We offer PRECIOSA Oblongs in two sizes: 5 x 3.5 mm and 10 x 3.5 mm. PRECIOSA Oblique Oblongs are a special type of these seed beads which are also rounded and therefore have a more rounded shape than the standard PRECIOSA Oblongs.