If you are designing on the web, Android, or iOS, a pixel is probably not what you think it means. Pixels, Points, and Density-independent pixels
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All tagged Design - User Interface
Why are phone dimensions backwards: Height x Width ?
Mobile phones and tablets advertise Height x Width x Depth ? This seems backwards.
UI/UX: Writing X vs Y dimensions
Almost always write the HORIZONTAL dimension first, the VERTICAL second. Unless, you are a fine art dealer or mobile phone manufacturer.