I want to make an A4 saddle stitch booklet(A3 spreads). I am confused as to what paper size I would have to use. I would have to include crop marks and bleed and if I printed on A3 would I have to shrink the spread to include space for crop marks and bleed?

I guess I am just confused as to weather the crop marks and bleed extend outside of the page size therefore having to make more space for them. I don't want to print A2 for each spread if this is the case so I am thinking I may need to shrink the publication to A5 instead?

Another question is weather it is necessary for me to include bleed in my publication as I don't have anything going off the edges of the pages?

I want to make an A4 saddle stitch booklet(A3 spreads). I am confused as to what paper size I would have to use. I would have to include crop marks and bleed and if I printed on A3 would I have to shrink the spread to include space for crop marks and bleed?

I guess I am just confused as to whether the crop marks and bleed extend outside of the page size therefore having to make more space for them. I don't want to print A2 for each spread if this is the case so I am thinking I may need to shrink the publication to A5 instead?

Also, is necessary for me to include bleed in my publication as I don't have anything going off the edges of the pages?