Left to right: Ὁ Σωτήρ Brotherhood edition (vest-pocket size), Ζωή Brotherhood edition, Hellenic Bible Society edition, PocketGNT edition
While most people these days use electronic devices to make the Greek New Testament text portable, some prefer a small paper copy. I know of no major publisher who offers a shirt-pocket-sized Greek NT for sale in the Western Hemisphere.
A small, family-run firm in South Dakota began in early 2023 offering hand-bound copies of the 1904 edition of Eberhard Nestle's Greek text, which has been available in accurate electronic form in the public domain for many years. Prices as of March, 2023 range from $30-$65. These testaments are not available through me; you will find them at www.pocketgnts.com.
I encourage you to check out what is offered there. As far as I am aware, these are the only shirt-pocket-sized editions of a critical-type text available anywhere in the world.
Several publishers in Greece offer shirt-pocket-sized editions of the Patriarchal Text of 1904, which is a Byzantine Majority-type text. These editions are available for sale at various websites in Greece, with varying degrees of ease in locating and purchasing the desired item. I imagine that others have found, as I have, that using a credit card for international purchases sometimes results in security issues that cause the card issuer to cancel it and replace it with a new card. So, though having to ship the item twice and needing at least a little something to compensate the time I spend in this work keeps me from being able to offer these testaments at prices much if any below what you can get them for directly from Greece, I can provide them with more convenience and security, as well as provide a lot of information here to facilitate choosing. That information includes links to sites in Greece where these testaments are for sale, for the sake of those who want to purchase directly from Greece. This is especially useful for buyers outside the US, for whom shipping rates from the US would raise prices well beyond the cost of buying directly from Greece.
To aid US buyers who would like to purchase such small editions of the Greek NT and who prefer or are at least willing to have a Majority-type text, at price points lower than are possible for the hand-bound editions mentioned above, I am stocking and offering for sale several editions that I have been able to locate and import.
As you would expect, the editions differ in quite a variety of ways, making it difficult to make a selection without holding copies of them in your own hands for comparison. To facilitate decision-making, I have prepared a 7-page PDF document
comparing the available editions. Among other kinds of information it contains is a page that, when printed at 100% scaling, will show a page photo from each edition at its actual size, to aid in determining adequacy of font size. All of these editions are readable for people with average vision, but those with weaker vision may find some of them to be too small. Type sizes vary from approximately 5.8 to 8 points, which is a significant difference.
Possibly too small to read here (depending on your device), but at least to show the value of this file's contents, I supply a page image of the comparison chart included in the document.