What Size Is This?
Enter dimensions. Find every matching standard size.
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Universal Standard Size Finder
What Size Is This? is a free online tool that instantly identifies standard sizes from any dimensions you enter. Whether you're measuring paper, a mattress, a screen, a picture frame, or a piece of lumber, simply type in the width and height and the tool will show you every matching standard size across all categories.
How It Works
Enter your width and height measurements in any unit — inches, centimeters, millimeters, feet, or meters. The tool compares your dimensions against a comprehensive database of standard sizes and shows exact matches as well as close matches within your chosen tolerance. Results are served instantly from our global CDN edge network.
Supported Size Categories
Paper & Printing
ISO A-series paper sizes (A0 through A7), ISO B-series (B0 through B5), US paper sizes including Letter (8.5 x 11 inches), Legal (8.5 x 14 inches), Tabloid (11 x 17 inches), Executive, and Half Letter. Also covers envelope sizes: #10 business envelope, #9 envelope, A7 envelope, DL envelope, C4, C5, C6, and catalog envelopes like 6x9 and 9x12.
Photos, Prints & Frames
Standard photo print sizes from 4x6 through 27x40 movie poster. Picture frame sizes from 4x6 to 24x36. Canvas sizes from 12x12 to 30x40. Poster sizes including standard 24x36 and movie one-sheet 27x40.
Mattresses & Bedding
All standard mattress sizes: Crib (28x52 in), Twin (38x75 in), Twin XL (38x80 in), Full/Double (54x75 in), Queen (60x80 in), King (76x80 in), and California King (72x84 in). Also fitted sheets, comforters, pillows, throw blankets, and shower curtains.
Screens & Displays
Monitor sizes from 24-inch through 34-inch ultrawide. TV sizes from 43-inch to 85-inch. Screen resolutions including Full HD (1920x1080), QHD (2560x1440), 4K (3840x2160), and ultrawide formats. Social media image dimensions for Instagram, Facebook, YouTube, Pinterest, and Open Graph.
Home & Construction
Interior doors, closet doors, windows, garage doors. Building materials like 4x8 plywood sheets and drywall. Lumber actual dimensions for 2x4, 2x6, 2x8, 2x10, 2x12, 4x4 posts, 6x6 posts, and boards. Bricks, concrete blocks, PVC pipe sizes, and fasteners (metric bolts and nails). Tiles from 3x6 subway to 24x24. Insulation batts and countertop dimensions.
Home Furnishings
Rug sizes from 3x5 to 9x12 feet. Towels (washcloth, hand towel, bath towel, bath sheet, beach towel). Table linens, placemats, dinner napkins. Curtain sizes. Fabric and quilting cuts including fat quarter, fat eighth, charm pack, layer cake, and jelly roll.
Technology & Devices
Laptop dimensions for MacBook Air, MacBook Pro, Dell XPS, and ThinkPad. Tablet sizes for iPad Mini, iPad, iPad Pro, and Galaxy Tab. Phone sizes for iPhone 16, Galaxy S25, and Pixel 9. Storage drives: 2.5-inch, 3.5-inch, M.2 2230, M.2 2280, SD card, and MicroSD. PCBs: Raspberry Pi, Arduino Uno, Mini-ITX, ATX, Micro-ATX. Rack mount sizes. Memory modules (DIMM and SO-DIMM). Batteries from AAA to 18650. USB-A and USB-C connectors.
Sports & Recreation
Court dimensions for basketball (NBA), tennis, pickleball, and volleyball. Ball sizes for basketball, soccer, tennis, golf, baseball, and bowling. Table game surfaces for pool tables, ping pong, and dartboard. Skateboard and longboard sizes. Bicycle wheel sizes (BMX, MTB 26", MTB 29", road 700c).
Food & Kitchen
Pizza sizes from small (10") to XL (16"). Baking pan sizes including 9x13 casserole, half sheet pan, pie plate, and bundt pan. Dinnerware plate sizes. Standard can sizes (12oz, 16oz tallboy, slim can), wine bottles, and mason jars.
Cards, Books & Media
Playing cards (poker, bridge, trading card, tarot). Board game dimensions (chess, Monopoly, Scrabble). US business cards and credit cards (ISO ID-1). Passport size. Book sizes from mass market paperback to coffee table books. Comic books and magazines. CD/DVD/Blu-ray discs. Vinyl records (7-inch single, 12-inch LP).
Automotive & Outdoor
License plates for US, European, and Japanese vehicles. Parking space and garage dimensions. Shipping box sizes (USPS flat rate). US flag sizes (3x5 ft, 4x6 ft) and garden flags. Appliance dimensions for refrigerators, ovens, dishwashers, and washers/dryers.
Common Size Lookups
People frequently use this tool to answer questions like: "What size paper is 8.5 x 11?" (US Letter), "What size is a queen bed?" (60 x 80 inches), "What are the dimensions of A4?" (210 x 297 mm), "What size frame do I need for an 8x10 photo?", "Is my screen 1080p or 1440p?", "What size mattress is 54 x 75?" (Full/Double), and "What size lumber is actually 1.5 x 3.5 inches?" (a 2x4).