Caption Font Size Guide for Reels: What Works on Mobile Screens
Caption font size is one of the most overlooked details in short-form video. A well-timed caption in a bad font size will lose viewers as fast as no captions at all.
Featured Studio Visual: Caption Font Size Guide for Reels: What Works on Mobile Screens (Itnavideo Production Engine)
Caption font size directly affects readability on mobile. Too small and viewers skip. Too large and the video looks amateurish.
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- •Accessibility & Retention: Hardcoded burned-in subtitles ensure 100% viewer retention on muted mobile feeds.
Why mobile size is different
A caption that looks fine on a desktop preview can be tiny on a phone screen. Most viewers watch short video on a 6-inch phone at arm length.
For 1080x1920 vertical video, the minimum readable caption size is around 44px for body text and larger for headline-style captions.
Large vs small captions by use case
Motivational and bold content works better with large captions that fill a bigger area of the screen.
Narrated tutorials, podcast clips, and conversational reels work better with medium-sized captions that do not distract from the speaker.
Safe zones for caption placement
Keep captions inside the safe zone for each platform. Instagram Reels hides the bottom 200 pixels with UI elements.
Itnavideo positions captions in the bottom safe area by default to avoid platform UI overlap.
Font size settings in Itnavideo
Auto Caption Video offers small, medium, large, and extra large font size options.
Extra large works well for One Word and Bold Fire styles. Medium or large is the best default for most talking-head content.
Frequently Asked Questions
What is the best font size for Reels captions?
Large or extra large for bold styles, medium for conversational content.
Can I set exact pixel sizes?
Itnavideo uses size presets: small, medium, large, and extra large.
Do caption sizes affect render time?
No. Caption size does not affect render speed.
Contextual Itnavideo Tools & Features
Direct studio links for Auto Caption Reel
Authoritative Industry Standards & Research
Verified external technical documentation, official accessibility guidelines, and platform specification portals:
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