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Set any page size in Google Docs™: Kindle, B6, postcard, receipt or your own mm/inch size. Every size is free. No sign-up.
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Listing updated:October 15, 2026
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Overview
Change the page size of a Google Docs™ document to exactly what you need: a Kindle paperback, a B6 or bunko book, a postcard, a business card, a receipt roll, a poster, or any width and height you type in.

WHAT IT DOES
• Pick a preset or enter a custom width and height in mm, cm, inches or points. Switching units converts the other values for you.
• Presets: Kindle-style book sizes (5 x 8, 5.5 x 8.5, 6 x 9 in), Japanese book formats (A5, B5, B6, shiroku-ban, bunko, shinsho), postcards, business cards, receipts (58 mm and 80 mm), A2 and A1 posters, US Letter, Legal and Tabloid.
• Set portrait or landscape, the four margins and a gutter (binding margin).
• A confirmation message shows before anything changes, and an Undo button restores the previous page setup.
• No watermark and no e-mail sign-up. Every size, unit, orientation, margin and gutter setting is free.

FREE AND PAID
The free version has every size and setting above for the current tab. The paid version is a one-time purchase of $9 (no subscription) and adds:
• Margin and gutter presets
• Save up to 50 named custom sizes
• Apply a size to all tabs of the document at once

HOW TO USE
Open a document, then choose Extensions > Custom Page Size for Google Docs™ > Set page size. Choose a size, check the confirmation, and apply.

YOUR DATA
The add-on reads only the document you have open, and it changes only that document's page setup. It never reads or changes your text, images or tables, and it cannot see any other file in your Google Drive™. Besides Google, it contacts only Gumroad, and only to verify a paid license key (it sends the key and the product ID, nothing else).

PERMISSIONS
• documents.currentonly: to read and change the page setup of the document you have open. It cannot access any other file.
• script.container.ui: to show the sidebar.
• userinfo.email and userinfo.profile: basic sign-in information that Google includes by default.
We deliberately do not request drive or drive.readonly.

SUPPORT
dailypicks.blog@gmail.com. Guide and troubleshooting: https://daily-picks.life/page-size/

Google Docs™ and Google Drive™ are trademarks of Google LLC.
Additional information
PricingFree of charge with paid features
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Custom Page Size for Google Docs™ will ask for the permissions shown below. Learn more
Custom Page Size for Google Docs™ will need access to your Google account
This will allow Custom Page Size for Google Docs™ to :
View and manage documents that this application has been installed in
Display and run third-party web content in prompts and sidebars inside Google applications
See your primary Google Account email address
See your personal info, including any personal info you've made publicly available
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