KDP Trim Sizes: How to Choose the Right Book Size
Every Amazon KDP trim size in inches and centimeters, which size fits which kind of book, and how trim size changes your page count, printing cost, and royalties.
For self-published KDP authors
Sell more books
on Amazon.
AuthorClimb is the toolkit that gets your book found: daily keyword rank tracking, BSR & sales analytics, listing optimization, A+ content, and category research — the whole desk, in one place.
Free account, no credit card. Switch on a 7-day Pro trial whenever you want every tool unlocked.
- Built for KDP authors
- 7-day Pro trial, no card
Writing the book was the easy part.
You published on KDP. You waited. Nothing happened. That's not because your book isn't good — it's because Amazon's algorithm only promotes books that already have momentum. The right keywords, the right categories, an optimized listing. Without those, you're invisible.
Category Finder
Picked the wrong categories? Easy to fix.
KDP gives you 10 category slots — most authors waste 8 of them. AuthorClimb scores every Amazon category against your book and surfaces the ones where you can realistically rank #1, not just the ones that sound right.
5,200+ categories · AI-scored relevance · free on every plan
Cozy Mystery94
Women Sleuths88
Amateur Sleuths76
Crime Fiction41
Relevance vs. your book
Keyword Tracker
Are readers actually finding your book?
You picked keywords when you published — but do you know if they're working? Track your Amazon search ranking for every keyword, daily. See who's outranking you and where the real opportunities are.
Updated daily · competitor SERP data included
historical fiction kids#3
adventure books 8-12#7
chapter books boys#12
Ranking trend — last 30 days
Listing Optimizer
Your listing is your storefront. Is it working?
Most authors write their product description once and never touch it again. AuthorClimb analyzes yours against the top-ranking competitors for your keywords and shows you exactly what to fix — with smart rewrite suggestions to save you time.
Keyword gap analysis · relevancy scoring · smart suggestions
82
Relevancy Score
vs. top 10 competitors
Book Tracker
Know what actually moves your sales.
Upload your KDP report, log changes like price drops, cover updates, or new keywords, and Book Tracker shows the before/after impact on orders and KENP reads. Stop guessing which tweak worked — measure it.
KDP sales import · event timeline · before/after impact
Before4.2 / day
After11.8 / day
Cover update — 14-day impact
A+ Content
Look like a traditional publisher — without one.
The "From the Publisher" section can boost conversions by up to 8%. But most indie authors skip it because it's a pain to create. Upload your book, pick a layout, and AuthorClimb handles the rest.
Professional layouts · AI-generated copy and images
Without
With A+
+8%
conversion lift with A+ Content
Four steps to more sales.
01
Add your books
Import from Amazon with your ASIN, or add manually. Your full catalog in minutes.
02
Track & analyze
See where you rank for every keyword. Analyze your listing against the competition.
03
Optimize & create
Improve your description, build A+ content, and find the best categories for your book.
04
Measure & iterate
Log price drops, cover changes, and new keywords — see the before/after impact on sales.
Simple, transparent pricing.
Start with free tools for one book. Upgrade to Pro or Ultra for keyword tracking, sales analytics, listing optimization, and the full toolkit.
Try the tools before you subscribe.
A free account includes limited Category Finder and Listing Optimizer access for one book. You can activate a 7-day Pro tools trial if you haven't used it before. No card is required, and the trial ends without an automatic charge.
Free account. Optional paid plans.
Start with free tools for one book. Paid plans unlock the full toolkit for more books. Paid plans renew until canceled. Cancel future renewals through Manage Subscription in your account.
| Feature | FreeFreeNo card needed | Pro$29/moFull toolkit for 10 books | Ultra$79/moFull toolkit for 40 books |
|---|---|---|---|
| Toolkit | |||
| Tools included | Limited tools | Full toolkit | Full toolkit |
| Books with tool access | 1 | 10 | 40 |
| Start free | Get Pro | Get Ultra |
Your book deserves to be found.
Join the self-published authors using AuthorClimb to rank higher and sell more on Amazon.
Create your free accountNo credit card required · turn on a 7-day Pro trial whenever you like
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