These Chabad Tefillin are extra large, measuring 4 x 4 cm, as per the Chabad custom. The Tefillin are made out of a single piece of leather (with inserts that make sure they close properly). The straps of the Tefillin are made from the top part of the hide (known as Retsuot Elyon).

Made in Israel by Pe'er HaSTaM, the Tefillin are Kosher, proofread by both an expert and computer and come with certification certifying both their Kashruth level and their having being checked by a computer.

Important to know:
If you are right-handed you wear the Tefillin on the left arm whereas if you are left-handed you wear the Tefillin on the right arm.