The dimensions of an overbed table can vary depending on the specific model and manufacturer, but here are some common dimensions that you might encounter: 

1. Tabletop: The dimensions of the table top can range from 15 to 30 inches in width and 20 to 30 inches in length. 

1. Height: The height of the table can typically be adjusted to accommodate different bed heights and patient needs. The height range can vary from around 28 to 45 inches. 

1. Base: The base of the overbed table is typically designed to fit over the bed frame and can range from 22 to 32 inches in width and 15 to 25 inches in length. 

It is important to choose an overbed table that is appropriate for the patient’s needs and size, and to ensure that it is installed correctly according to the manufacturer’s instructions. It is also important to consult with a healthcare provider or a specialist in home safety equipment to determine if an overbed table is appropriate for the patient’s needs and circumstances.