{"id":141,"date":"2026-11-10T10:00:00","date_gmt":"2026-11-10T04:30:00","guid":{"rendered":"https:\/\/getnixa.io\/blog\/?p=141"},"modified":"2026-11-10T10:00:00","modified_gmt":"2026-11-10T04:30:00","slug":"subtitle-font-size","status":"publish","type":"post","link":"https:\/\/getnixa.io\/blog\/subtitle-font-size\/","title":{"rendered":"Subtitle Font Size: The Right Size for Reels, Shorts and YouTube"},"content":{"rendered":"\n

The right subtitle font size depends on where your video plays. Text that looks huge on a laptop timeline can turn tiny on a 6-inch phone, and text that fits a reel can swallow a 16:9 YouTube frame.<\/p>\n

This guide gives you starting sizes for Reels, Shorts and YouTube, explains why pixel numbers differ between apps, and shows a quick test to check any size before you post.<\/p>\n\n

Quick answer:<\/strong> On a 1080 x 1920 vertical video, start captions at about 60 to 80 px, going bigger for one to three words at a time. On a 1920 x 1080 YouTube video, start at about 45 to 60 px. Then preview on a real phone at arm’s length and adjust.<\/p><\/div>\n\n

What is a good subtitle font size?<\/h2>\n

A good size is one your viewer can read in a glance, without the text covering the action. There is no single number, because three things change the answer: the frame size, the screen people watch on, and how many words you show at once.<\/p>\n

So treat any number as a starting point. The sizes in this post come from practical editing on phone-first content, not from a rule set by Instagram or YouTube. Neither platform publishes an official caption size for creators.<\/p>\n\n

Why pixel sizes differ between apps<\/h3>\n

A “font size” in an editor is not a fixed physical size. Some apps measure in pixels of the video frame, some in points, and some use a slider with no unit at all. So “60” in one app may look different from “60” in another.<\/p>\n

A more reliable way to think about it is height on screen. Ask how tall the letters are compared with the full frame. On vertical video, caption letters that fill roughly a thirtieth of the frame height usually read well on phones. On 16:9 video, the text can take a smaller share because the screen is often larger.<\/p>\n\n

\"Subtitle
Starting sizes by format. Always test on a phone before you export.<\/figcaption><\/figure>\n\n

Subtitle font size cheat sheet by platform<\/h2>\n

These are working ranges for 1080p projects. If you edit in 4K, double the pixel numbers.<\/p>\n

\n\n
Format<\/th>Frame<\/th>Caption style<\/th>Starting size<\/th>Lines<\/th><\/tr><\/thead>\n
Instagram Reels<\/td>1080 x 1920<\/td>1 to 3 words, animated<\/td>75 to 90 px<\/td>1<\/td><\/tr>\n
Instagram Reels<\/td>1080 x 1920<\/td>Short phrases<\/td>60 to 75 px<\/td>1 to 2<\/td><\/tr>\n
YouTube Shorts<\/td>1080 x 1920<\/td>Short phrases<\/td>60 to 75 px<\/td>1 to 2<\/td><\/tr>\n
WhatsApp Status<\/td>1080 x 1920<\/td>Short phrases<\/td>65 to 80 px<\/td>1 to 2<\/td><\/tr>\n
YouTube long video<\/td>1920 x 1080<\/td>Full sentences<\/td>45 to 60 px<\/td>Up to 2<\/td><\/tr>\n
Square post<\/td>1080 x 1080<\/td>Short phrases<\/td>50 to 65 px<\/td>1 to 2<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n

Why is WhatsApp a little bigger? Status videos are often re-compressed and watched on budget phones, so thin, small text breaks up faster. A slightly larger, bolder font holds up better.<\/p>\n\n

Font size for Reels and Shorts captions<\/h2>\n

Vertical video is watched on a phone held about a forearm’s length away. So the text has to work on a small screen, often in sunlight, with the sound off.<\/p>\n