Using 10mm metal cylinders as focus beads is a great choice, especially when you're incorporating a tassel into your design for a Guru piece. The larger size of these cylinders can serve as a bold and eye-catching focal point in your jewelry.
Pairing them with 4mm matching metal cylinders is a clever design idea. This combination creates contrast and visual interest, as the size differential between the beads can add depth and dimension to your piece. The matching metal and design continuity between the two sizes can also provide a cohesive and harmonious look to your jewelry or accessory.
 
When selecting the metal for your cylinders, consider the finish, whether it's antique silver, gold, bronze, or any other type, to complement your overall design. This combination of sizes and matching metal cylinders can help you create a stunning and personalized Guru piece with a tassel.