Vagaro is the most numeric of the salon platforms and the limits vary by slot, which is where people get caught. A service image caps at 4MB and is meant to be roughly 798 x 894 pixels — a tall, near-square frame. Review photos also cap at 4MB each, up to three per review. The business logo must be at least 1000 x 667 pixels and no more than 5MB, and product photos carry the same 5MB cap with a 1000 x 667 minimum. Portfolio structure is tight too: up to three portfolios with three images in each, plus a venue gallery that can hold up to 100 photos. Read together, that is a platform where a modern phone photo fails on the service image slot almost every time — a 6MB capture will not upload, and a 12MP portrait will not match a 798 x 894 frame without cropping through the subject. Vagaro also asks you to acknowledge that your portfolio photos meet its guidelines, so a set of oversized or badly cropped images is a compliance problem as well as a quality one. The practical workflow is per-slot: resize to the frame that slot wants, compress under its cap, keep enough resolution to satisfy the 1000 x 667 floor where one applies. Skwish resizes to exact custom dimensions, compresses to a target size in KB where you need a hard number, and batches the venue gallery so a hundred photos is one job.