Instagram sizes, minus the folklore
There are fewer numbers to remember than the internet suggests. These are the ones that change how your post looks.
Search this topic and you'll drown in spreadsheet-length "complete guides" listing a dozen dimensions to memorize. Ignore most of it. For a small business posting images, only a few choices actually change how your post looks in someone's feed — and they're choices, not trivia.
The first is shape. Instagram images come in three: square, portrait, and landscape. Portrait wins for one unglamorous reason — the feed is a vertical strip on a vertical phone, and a taller image simply occupies more of it. A portrait post gets more screen per scroll than a square one, and landscape gets the least of all; it's the difference between a window and a letterbox slot. Landscape earns its place only when the subject is genuinely wide — a storefront, a skyline, a long table set for service. Default to portrait, keep square for the grid-perfectionists, and treat landscape as a special occasion.
The second is the safe area. Instagram's interface draws over your image — username up top, actions and caption creeping in from the bottom, and crops shifting between the feed and the profile grid. Anything important living near an edge will, sooner or later, sit under a button. This is the most common self-inflicted wound in small-business posts: the offer, the date, or the phone number parked in the bottom tenth of the image, invisible exactly when someone's thumb hovers over it. Keep text and faces comfortably inside the middle of the frame and the interface can do what it likes.
The grid crop deserves its own sentence, because it's the one people discover angry. Your profile grid shows a cropped square-ish preview of every post regardless of its posted shape — so a portrait image loses its top and bottom in the grid view. If the composition only works with the full frame — text at the top, product at the bottom — the grid shows a beheaded version to exactly the people who cared enough to visit your profile. Compose so the middle of the image survives alone, and both views win.
The third is format — single image or carousel — and it's a job decision, not a size decision:
- Single image: one thing, said once. The announcement, the finished job, the dish. Strongest when the image needs no explanation — it's the format of confidence.
- Carousel: a sequence with an order. The before-and-after, the room-by-room, the step-by-step. Each slide earns the next swipe. Worth knowing: a good carousel is exactly the images you chose, in order — and a closing call-to-action slide belongs only when there's genuinely somewhere to send people. Padding a six-image story to ten slides weakens all ten.
One piece of publishing reality while you're here: posting to Instagram through any tool — GigaDrip included — requires a professional account, meaning Business or Creator. Personal accounts can't be published to via Instagram's API at all; that's Instagram's rule, and any tool claiming otherwise is describing a workaround you don't want. Both single images and carousels publish fine on a professional account. The details live on the Instagram page.
The practical close: pick one shape — portrait, almost certainly — and stay with it. A feed with a consistent shape reads as intentional even before anyone processes the content, and a recognisable grid beats a perfectly-sized one every day of the week. Sizes are the folklore; consistency is the craft.
And once the shape is settled, notice that it was never really the hard part. The sizing question gets asked so often because it's the answerable one — the hard parts are what the post says on each platform and where the ideas come from in the first place. If a tool is building your visuals — GigaDrip composes them at Instagram's sizes with the text inside the safe area by construction — the folklore stops being your problem entirely, and you can spend the attention where the folklore never helped.