A3 is a larger, international paper size that measures roughly 11.7 x 16.5 inches (297 x 420 mm). It offers more space than Letter or A4, which can be helpful when you need bigger visuals or extra room for notes.

• Dimensions: About 11.7 x 16.5 inches (portrait) or 16.5 x 11.7 inches (landscape).
• Good for: Posters, classroom charts, presentations, mind maps, and crafts.
• Printing tip: Actual printable area can vary by printer due to margins. If sizing is critical, check your printer’s paper settings and margin options.

On Walmart.com, look for A3 in the size filters to find paper that matches these dimensions.

A3 and 11x17 are close in size but not identical. A3 is about 11.7 x 16.5 inches, while 11x17 (often called Tabloid or Ledger when rotated) is exactly 11 x 17 inches. That means:

• A3: Slightly wider and a bit shorter.
• 11x17: Slightly narrower and a bit taller.

For many projects—like posters or proofs—the difference may be manageable, but if exact dimensions matter, choose paper labeled A3. When setting up prints, select the matching paper size in your printer settings; naming can vary by device, so checking the driver’s size list can help avoid unintended scaling.

A3 is essentially twice the area of A4. Here’s the quick breakdown:

• A4: About 8.3 x 11.7 inches (210 x 297 mm).
• A3: About 11.7 x 16.5 inches (297 x 420 mm).

Two A4 sheets combined make one A3 in area, which is why A3 is popular for bigger visuals—think posters, charts, or large worksheets—while A4 is common for everyday documents. If you’re scaling up an A4 design to A3, proportions typically stay consistent, but margins and printer settings can affect the final layout, so a quick print preview is useful.

There isn’t an exact U.S. name for A3. The closest common U.S. size is 11 x 17 inches, often called Tabloid (portrait) or Ledger (landscape). However, A3 is slightly different at about 11.7 x 16.5 inches, so it’s not a perfect match.

• Shopping tip: Look specifically for products labeled “A3” if you need the ISO size.
• Printing tip: Many printers list A3 as a selectable size. If yours doesn’t, it may list 11 x 17 instead; check your driver’s options and margins, as settings can vary by model.

On Walmart.com, use the size filter to find A3-labeled paper and media.

Pick an A3 paper that fits your project and printer:

• Everyday prints: 70–90 gsm plain paper for drafts, handouts, and notes.
• Presentations & flyers: 120–160 gsm for a sturdier feel and cleaner graphics.
• Posters & crafts: 160–270+ gsm cardstock for durability and minimal curl.
• Photos & vivid graphics: Glossy or satin photo paper (check inkjet vs. laser compatibility).
• Art & design: Specialty pads (e.g., watercolor or textured) for media-specific results.
• Durability needs: Waterproof or tear‑resistant sheets can help for outdoor or heavy handling.

On Walmart.com, filter by size (A3), weight (GSM), finish, color, and printer type to narrow choices. Results can vary by printer and settings.