Square Clay Thickness Rolling Frames A long requested addition, Square Clay Rolling Frames bring the same precision and ease you love, now in a perfectly balanced square format. Designed to make rolling metal and polymer clay to exact thicknesses simple and consistent, these frames eliminate the hassle of uneven guides (and messy stacks of playing cards). Each frame is clearly labeled to correspond with its card thickness equivalent and millimeters, so you can achieve repeatable results every time. With an outside dimension of 4.75" and a generous 3.6" inner opening, these frames provide a comfortable working area while maintaining control. Available individually or in sets, Square Rolling Frames come in standard thicknesses (2, 3, 4, 5, 6, 8) as well as extended sizes (12, 16, 20) for more creative possibilities and thicker designs. Stack frames to create virtually any thickness you need. Made in the USA Details: Outside dimensions: 4.75" Inside opening: 3.5" Biodegradable Made in the USA Available Options: Standard Thickness Set (6 Frames): 2, 3, 4, 5, 6, 8 Extended Thickness Set (3 Frames): 12, 16, 20 Individual Frames Optional add-on: Non-Stick Wonder Roller (7" length)