When buying a used offset press, most buyers grill the seller about brand and unit count first and leave sheet size for last. That is backwards: format drives the purchase price, the floor plan and the jobs you can accept — within the same era, a 40-inch press can list for over five times the price of a small-format unit. The hard numbers for the four mainstream formats:
- 14x20 in (360 format): the Heidelberg Speedmaster SM 52 takes sheets up to 370 x 520 mm and down to 105 x 145 mm, with an 8–10 mm gripper margin — the natural home of business cards, coupons and short-run work.
- Half-size (29 in): the SM 74 handles 530 x 740 mm maximum and 210 x 280 mm minimum stock, runs substrates from 0.03 to 0.60 mm thick at up to 15,000 sph — the workhorse format for books and brochures.
- 40 in: the SM 102 and CD 102 take sheets up to 720 x 1020 mm (minimum 340 x 480 mm) with a 1020 x 710 mm printable area; one 40-inch sheet nests four half-size ones.
- XL format: the XL 105 prints a 1050 x 750 mm sheet at up to 18,000 sph, while the later XL 106 stretches to 750 x 1060 mm for premium packaging.
Match the format to your job mix, not your budget
Work backwards from the order book: if over 70% of monthly volume is small commercial work — cards, leaflets, coupons — a small-format press covers it, and that 105 x 145 mm minimum becomes a real selling point. Catalogues and textbooks live at half size; cartons and bags demand 40-inch or XL. Buyers who set the budget first usually end up idling a large-format press on half-size work, paying for power and labour while the extra capacity runs to waste.
Format sets the base price; configuration sets the spread
September 2026 listing data from used-equipment platforms: among half-size presses, a 2010 SM 74-4H four-colour listed near RMB 3.19 million while a 1997 five-colour Komori L 528 asked about RMB 780,000 — a more than fourfold spread within one format. At 40 inches, a 2008 KBA Rapida 105-5 five-colour listed near RMB 3.99 million. Trade-in quotes are blunter still: a mid-2000s GTO 52 that still runs fetches only RMB 30,000–60,000.
Three sheet-size checkpoints at inspection
First, the substrate thickness range: 0.03–0.60 mm on a half-size press covers 40 gsm tissue to 600 gsm board; anything beyond needs a model that actually supports it. Second, the minimum sheet capability: with perfecting engaged the minimum tightens further, so test the smallest stock on site. Third, the gripper margin: budget that 8–10 mm into every imposition, or artwork will creep into the bite.
Bottom line: sheet size is decision number one on a used offset press — small format eats short-run thin-margin work, half size takes books and brochures, 40-inch and up take packaging. Lock the format from your job mix first, then narrow to a specific machine by colour count, year and thickness range, and the budget never buys capacity you will not use.
