These nifty little grips take using a Lumos to another level, made from your choice of Portugese Cork or Natural or Black Veg-Tanned leather they have a soft, forgiving tactile feel making writing, drawing or brush lettering a joy. Measuring 12-13mm in diameter they have a nice chunky feel to them meaning you don't have to death-grip your pen, they also slide up and down so you can use it easily on either end of your Lumos Pro. As a little bonus I designed them to create a rollstop so your pen won't be going anywhere even on the most uneven of surfaces. Each sleeve is lovingly handmade in the UK by master leatherworker, Edward De Lacy. You'll notice the level of care Edward takes when you see the exquisitely burnished edges! The grip measures: 12-13mm x 40mm and weigh 3 grams