The Brother SE1900 Sewing and Embroidery Machine has a maximum embroidery area of 5″ x 7″, which is a good size for creating embroidery patches. This means that the largest patch you can embroider on this machine is 5 inches wide by 7 inches tall.

However, it’s important to note that the size of the patch you can embroider will also depend on the design you want to embroider. If you are embroidering a complex design with a lot of detail, you may need to reduce the size of the patch to ensure that the design fits within the 5″ x 7″ embroidery area.

Overall, the Brother SE1900 is a versatile and capable machine that can produce high-quality embroidery patches up to the maximum size of 5″ x 7″