I read in the news about an Israeli designer, Yaakov Merdinger, who created the world's largest mezuzah case.

The mezuzah -- taller than the door.

As you can see in the photo, the mezuzah case is bigger than the door.

Is this kosher?

  • 2
    Mezuzah or mezuzah cover?
    – sam
    Jul 19, 2015 at 13:08
  • @sam Both, i guess.
    – Scimonster
    Jul 19, 2015 at 13:09
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    In the times of the Talmud, they didn't have separate covers affixed to the door post - they literally drilled a hole into the wall at an angle and inserted the scroll. The modern incarnation of an actual "cover" isn't really a halachic issue... Jul 19, 2015 at 17:14
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    I suspect the answer is more a matter of proportion to the doorway than an absolute measure of the mezuzah itself.
    – Yishai
    Jul 19, 2015 at 17:32
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    At the Kotel there is a large mezuzah cover which is partially transparent so you can see that the klaf inside is equally large. So even though this article is about a mezuzah case, the question of a large klaf still stands. Picture of giant koten mezuzah: flickr.com/photos/bachrach44/19885274442/in/dateposted-public Jul 21, 2015 at 18:37

2 Answers 2


A mezuzah case is really only a way to extend the halachik doorpost such that there is no need to actually insert the klaf into the doorpost itself, so inherently, size should not be a halachik issue. Even with regard to the mezuzah klaf (parchment) itself, as long as it can fit in the appropriate place on the doorpost (bottom of top third, not within the uppermost tefach *), there shouldn't be a problem. According to Ashkenazic custom you might also need a rather wide doorpost as well in order to be able to angle it. On the other hand, you would not need as tall a doorpost since the Ashkenazic custom is to place it at shoulder height if the doorway is very tall (see Shach 289:4 based on Yerushalmi; in contrast, see also Yalkut Yosef YD 285:77 who does not rule differently for tall doorways). See: http://www.halachipedia.com/index.php?title=Mezuzah:

Tall doorway

  • See Rashi Menachoth 33a s.v. “b'techila,” Rambam Hilchoth Mezuzah 6:12, Tur 289, Shulchan Aruch 289:2

The Kitzur Shulchan Aruch in סימן יא - הלכות מזוזה says that a Mezuza must be placed in the upper 3rd of the doorpost, but at least a Tefach (about 8 cm, 3") away from the lintel.

סעיף ה': מְקוֹמָהּ מִתְּחִלַּת שְׁלִישׁ הָעֶלְיוֹן שֶׁל גֹּבַהּ הַשָּׁעַר. קְבָעָהּ לְמַעְלָה מִזֶּה, כְּשֵׁרָה, וְהוּא שֶׁיַּרְחִיקֶנָּה מִן הַמַּשְׁקוֹף טֶפַח. קְבָעָהּ לְמַטָּה מִשְּׁלִישׁ הָעֶלְיוֹן, צָרִיךְ לַהֲסִירָהּ וּלְקָבְעָהּ כָּרָאוּי וּבִבְרָכָה. וְאִם קְבָעָהּ בְּטֶפַח הָעֶלְיוֹן, יְסִירָה גַּם כֵּן וְיִקְבְּעֶהָ כָּרָאוּי, אֲבָל לֹא יְבָרֵךְ.‏

So if the doorway is high enough, a tall Mezuza can be used. In this case, the doorpost would have to be about 5.70m (over 18 feet) tall. Such doors do exist, in Cape Canaveral.

However, the article is misleading, as it's not referring to a Mezuza, but a Mezuza-case. How to write a Kosher Mezuza that would be that tall, is unclear to me - unless the Sofer uses very, very large margins on top and below the writing. (A Mezuza is traditionally written on 22 lines; so (without monster margins) you're looking at letters about 4cm - 1.5" tall, since the space between the lines should be the same height as the letters. Try using a 108-point font to see what I'm referring to, then try find a quill or feather large enough to write that.)

enter image description here

  • 2
    You don't actually need to use a quill or feather, nor does the writing implement need to make each 'stroke' in one motion. You can outline and fill in at will.
    – Double AA
    Jul 21, 2015 at 17:48
  • @DoubleAA, correct, you can. Good luck to the Sofer who plans on spending days (on a ladder) filling in 1.5" letters, without the ability to fix (almost) any leaks and smudges. Of course it can be done; people have even walked on the moon. I'm also wondering where you plan on getting Klaf that tall; though from knoll.com/product/sabrina-leather-hide I see that 55 sq feet of hide does exist. Jul 22, 2015 at 7:38
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    On a ladder? What's stopping you from laying it on the floor and sitting next to it with a paint brush?
    – Double AA
    Oct 17, 2017 at 14:25
  • The mezuzah has to be in the upper third, but what if it's also in the middle third and the lower third, like would be the case for such a large mezuzah?
    – magicker72
    Mar 10, 2022 at 18:39

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