True, the terminology 4, 8, 16 and 32 for indicating differences in accordion reeds comes from organs, but there is a difference in length, mass and pitch of different types of bass reeds.
So it makes sense, but maybe they could have used another more accurate accordion terminology for accordion reeds. And not simply copying the organists terminology.
Photo bottom of this page showing large/long bayan reeds in 1 reed plate:
http://www.harmonikas.cz/en/bayan-1
In the Harmonikas reeds factory assortment section is a pdf with sizes of some reeds (length, width and thickness of the reeds):
http://www.harmonikas.cz/en/assortment#obsah
This is not only the case in Russian bayans and their 32 bass reeds, but also eg in the Steirisch Harmonika so called Helikon bass reeds, who are larger/longer than normal bass reeds. In order to imitate some Tuba sounds:
http://www.accordions.com/index/how/dia/how_dia.shtml
quote:
The Helikon accordion is named after the Helicon Tuba, which evolved from ram horn trumpets, first used thousands of years ago. It is the Helikon bass reeds which give it a distinctive Tuba sound to the bass notes. This is because the bass reeds are much longer and wider than normal bass reeds. They reproduce low pitched tones like a Tuba. Quite often the low Helikon reeds are fitted to a single duraluminium plate. These reeds can be up to 1 inch longer than standard bass reeds. First used in Styrian diatonic accordions, these reeds are now found in piano accordions.
Here is a very good photo of the size of the Helikon bass reeds inside the bass part of a Steirisch Harmonika:
https://shop.michlbauer.com/service/ratgeber/die-steirische-harmonika.html
https://de.wikipedia.org/wiki/Helikonstimmplatten
Die Tonhöhe der Grundbasszunge ist meist im Bereich Kontra-G (G1 bis G, 48 Hz bis 98 Hz), in machen Fällen auch tiefer bis zum Kontra-C (C1, 32,7 Hz). Jedoch ist bereits der Ton Kontra-E (E1, 41,2 Hz) problematisch, da er starke Rückwirkungen auf den Diskant hat. Es entsteht eine Lautstärkemodulation (Amplitudenmodulation) des gleichzeitig gespielten Tons auf der Diskantseite.