Suitcases seem to be sold in 20, 24, and 28 sizes. The 28 bag comes the closest to the 62 limit but almost every 28 bag I've looked at had linear measurements of between 64-65.

In the luggage industry, a "28-inch suitcase" usually refers to the height of the bag, but the critical measurement for airlines is the "Linear Inches," which is the sum of the Length + Width + Depth. For most major airlines, the maximum size for a standard checked bag is 62 linear inches. A typical 28-inch suitcase often measures approximately 28" x 18" x 12", which totals 58 linear inches, safely within the 62-inch limit. However, problems arise because many manufacturers do not include the wheels and handles in their "28-inch" marketing label. If the actual exterior dimensions (including protruding wheels) are 30" x 20" x 13", the total becomes 63 linear inches, which technically makes it an "Oversized Bag." This can result in a "surprise" fee of $150 to $200 at the check-in counter. When shopping in 2026, it is a grounded peer recommendation to always use a tape measure on the entire bag, not just the fabric shell. While most standard 28-inch bags are designed to pass the 62-inch rule, over-stuffing the bag or using the "expansion zipper" can easily push a safe suitcase into the expensive "oversized" category.