90x210

90x210 is a paper size commonly used in printing and design. It is defined by its dimensions, which are 90 millimeters in width and 210 millimeters in length. This size is often referred to as "A10" in the ISO 216 standard, which is a series of paper sizes used internationally. The A-series is based on a ratio of the square root of 2, resulting in each successive size being half the area of the previous one.

The 90x210 size is particularly useful for small-scale printing projects, such as business cards, postcards, and small brochures. Its compact dimensions make it easy to handle and store, while still providing enough space for a variety of design elements. Additionally, its aspect ratio is similar to that of standard smartphone screens, making it a popular choice for digital design projects as well.

Despite its small size, 90x210 can be used effectively for various marketing materials, invitations, and even some types of packaging. Its versatility and ease of use have contributed to its popularity among designers and printers alike. However, it is important to note that while 90x210 is a standard size, specific printing requirements may vary depending on the printer and the intended use of the printed material.