Check each set on the Spellbinders web site; the dimensions of each die are noted in its description.
Nestabilities, The Wizard Die Cut Machine and more - Spellbinders
Spellbinders explains it this way: "The difference between die template sizes within a Nestabilities� set is �”, which becomes a �” border when layering. The difference between LG and SM Nestabilities sets is �”. Combining both the LG and SM sets of Nestabilities will allow for ⅛” borders when layering."