Are you referring to “stacks”? Connecting Threads stacks are 10” squares. I think the name “layer cake” is from Moda, so some fabric companies use the term only when it applies to Moda fabrics. But, I think, Connecting Threads now sells Moda fabrics, so perhaps they will sell layer cakes and stacks. Riley Blake refers to them as 10” stackers. Layer cakes, 10” stackers, stacks—confusing, right?