The WeChat Moments Image size (1080×1080px)
WeChat Moments lays out photos in a grid of small squares, so a square 1080x1080 image is the reliable choice: when you post multiple photos, Moments crops each into a square thumbnail, and starting from 1:1 means your composition is not chopped unexpectedly. A single photo can display taller, but the square is what keeps a multi-image post looking neat and predictable.
Because Moments is a mobile-first, phone-screen experience used by a huge audience, 1080x1080 hits the sweet spot of looking sharp on modern displays while staying light enough to load quickly, which matters when photos are viewed over mobile networks. WeChat compresses uploaded images, sometimes aggressively, so posting at a clean 1080px gives the compression good pixels to work from and helps your photo avoid looking muddy in the feed.
For posts that read well, keep your subject centered so the square thumbnail crop frames it properly, and remember that in a multi-photo grid each image is quite small until tapped, so bold, clear shots beat busy ones. If you are sharing a set, consistent square framing across all of them makes the grid look intentional. Everything here resizes 100% in your browser with no upload and for free, so your photos stay private on your device. WeChat updates its Moments layout and compression behavior over time, so verify the current handling before posting an important set.