Different sizes of mezuzahs are sold by Judaica stores, the main sizes are 10cm, 12 cm and 15 cm. The larger the size of the mezuzah, the easier it is to write on it as the size of the letters is more.
People usually select either the 10 or 12 cm mezuzah for around the house, and the larger 15 cm Mezuzah for the main entrance doorpost to the house.
The mezuzah is placed on an angle, usually at an angle of forty five degrees to the horizontal. It is believed that this is to resolve the conflict of opinion between two influential rabbis.
This angle is also used to emphasise the importance of compromise, to understand the other persons position and to reduce conflict in our lives as we enter a new room or situation.
Since the mezuzah is a religious scroll, it is mandatory to say the specified blessing before hanging a Mezuzah.
The user should hold the mezuzah against the doorpost in its correct place and recite the blessing in Hebrew before permanently attaching it.
The blessing in Hebrew is: “Baruch ata Adonai, Elohanu, melech ha’olam, asher kidshanu b’mitzvotav, v’tzivanu, lik’boa mezuzah.” This translated into English as, “Blessed are You, Hashem, our God, King of the Universe, Who Sanctified us with His commandments, and has commanded us to affix a mezuzah.”
Mezuzah cases can be made from a variety of materials.
These include:
If you are looking for a mezuzah case, you can use Ebay or Froogle to find for a beautiful case for yourself.
However, if you are looking for the scroll to be fitted inside the case, it is not advisable to use anyone unless you know them to be reputable.
It is very easy for deceitful or ignorant sellers to sell you a scroll that is not kosher, because even small imperfections would make a scroll non-kosher.
You can buy a Mezuzah (jewish boxed scroll) at eBay. However, you have to be careful to ensure that you are getting a genuine product.
You can contact Jewish merchandise boutiques, and check if they are stocking Mezuzahs.
The local Chabad may also help