For 6-8 month old babies, cut into strips the width of two adult fingers pressed together. That way they can grab with their palms. Not much will make it into their belly during this age, but it will be great for them to suck on and to strengthen their jaw and tongue muscles. Once they start developing their pincer grasp, usually around 9-10 months, you can cut into bite-sized pieces. However, I do encourage you to keep the pieces large so they can practice tearing, taking bites, and chewing. If you have a shoveler like me, this will help them to slow down.