are you talking about the old red sizzix machine that was the 1st one? or are you talking about the big shot or the Big Kick ?I have cut many on the Big shot same machine as big shot..they comer with a foldable big whit mat that has all the different types of dies for which side of the mat..IT cuts any of the metaldies out there.. There are some dis to big for the Big shot.
the circle set has 7 or 8 punch sixe circles they are nested together with no space between They are all nested together up to 20. theyare in .25 incremennt from.25 to 5.5 inches. so the biggest is 5.5# so I think if you rigged your old big red they would fit since they are similar size.....my old sizzixs die is 5 " x 5.5 " :) :)
hey Jo :) I measured & one of them is 4.75 " :) :)