Book thickness
Maximum (sewn or burst)	60mm
Maximum (perfect bound)	55mm
Minimum (any style)	3mm
Untrimmed cover length (head to tail)
Minimum	140mm
Maximum	400mm
Untrimmed cover width, foredge to foredge, when opened out flat
Minimum	200mm
Maximum	620mm
Maximum spine to foredge untrimmed	305mm
Paper Weight
Maximum advisable for Perfect Bound work
(grain direction head to tail)	135 gsm
Minimum paper weight for our folders	60 gsm
Minimum recommended weight for 1 x 2pp sheet	135 gsm
However, lower weights can be fed through the gatherers subject to stock
Cover Weight (Assuming correct grain direction)
Maximum	400 gsm
Minimum	130 gsm
Untrimmed size for Sewing
Minimum	150 x 75mm
Maximum	420 x 305mm