PdfRuler Blog
Guides on measuring PDFs, page sizes, units and print preparation. Page 2 of 5.
September 15, 2026 · 5 min readHow to Measure Label and Sticker PDFs Before PrintingCheck label and sticker sheets: label width and height, gutters, margins, corner radius spacing, and alignment, with a free online PDF ruler and grid overlay.September 11, 2026 · 4 min readEnvelope Sizes (DL, C4, C5, C6) in mm and Inches for PDF TemplatesStandard envelope sizes DL, C4, C5, C6 and C65 in mm and inches, which paper folds into each, and how to check a PDF envelope template against them.September 8, 2026 · 4 min readIs My PDF Really A4? How to Check 210 x 297 mmA PDF can look like A4 but be 209.9 x 296.9 mm or Letter. Check the exact page size, the tolerance printers accept, and how to find hidden size problems.September 4, 2026 · 4 min readHow to Check a Business Card PDF Size Before Printing (85 x 55, 90 x 50, 3.5 x 2 in)Check that a business card PDF is the right size, with the right bleed and safe zone: standard sizes in mm and inches, and how to verify each one.September 1, 2026 · 5 min readHow to Check Crop Marks and Registration Lines in a PDFCrop marks show where a printer will cut. Find them in a PDF, measure their offset and length, and check the trim size against the marks using a free online ruler.August 28, 2026 · 5 min readWhat Is Bleed in a PDF? How Much You Need and How to Check ItBleed is extra artwork past the trim edge so no white shows after cutting. Learn standard bleed sizes (3 mm, 0.125 in) and how to check bleed on a PDF.August 25, 2026 · 5 min readHow to Check PDF Margins and Bleed Before PrintingMeasure margins, safe area and bleed in a PDF before sending it to print. Learn typical bleed sizes (3 mm / 0.125 in) and how to verify them with a PDF ruler.