6×8 Photo Size: Exact Dimensions, Pixels, and A5 Comparison

A 6×8-inch photo measures exactly 15.24 × 20.32 cm, commonly rounded to 15.2 × 20.3 cm. In Taiwan, it is often called an eight-inch photo; some print menus use 6R.

Its easiest feature to remember is that its area equals exactly two 4×6 prints. It also has nearly the same area as A5 paper, although its width, height, and proportions differ. At a common 300 PPI printing target, prepare 1,800 × 2,400 pixels after cropping.

This size is useful when checking an eight-inch wedding-album specification, choosing between 5×7 and a larger display photo, or planning a frame or album page.

Complete 6×8 dimensions

Unit	Short	Long
Inches	6	8
Centimeters	15.24	20.32
Millimeters	152.4	203.2
Pixels at 300 PPI	1,800	2,400
Pixels at 150 PPI	900	1,200
Taiwan colloquial naming	—	Eight-inch photo
Print-menu name used by some vendors	—	6R

The inch-to-metric conversion is exact. The names are regional or vendor conventions: 6R is useful when reading some print menus, including those used in Hong Kong, but the vendor’s stated measurements remain the deciding specification.

flowchart TD
    A[Two 4 by 6 prints] --> B[One 6 by 8 rectangle]
    B --> C[1800 by 2400 px at 300 PPI]

Exactly twice the area of 4×6

Place two 4×6 prints together so their six-inch edges meet. Each print contributes four inches across the other direction, producing an eight-inch side. The completed rectangle is 6×8 inches.

The area calculation is straightforward:

4 × 6 = 24 square inches.
6 × 8 = 48 square inches.
48 ÷ 24 = 2.

The same relationship holds for a layout at a fixed image density. A 4×6 canvas at 300 PPI contains 1,200 × 1,800 = 2,160,000 pixels. A 6×8 canvas contains 1,800 × 2,400 = 4,320,000 pixels. The total pixel count doubles; the individual side lengths are not each multiplied by two.

For a before-and-after pair or two separate photographs, compare the cost of two 4×6 prints with a combined 6×8 layout. A larger sheet does not necessarily have the same price as two smaller ones. For a single larger display image, 6×8 provides the uninterrupted presentation that two separate prints cannot.

How 6×8 compares with other sizes

Size	Size (cm)	Area vs size	Use
4×6	10.16 × 15.24	Exactly 100% larger	Twice the area
5×7	12.7 × 17.78	About 37.1% larger	A clear step up
A5	14.8 × 21.0	About 0.36% smaller	Similar area, different shape
8×10	20.32 × 25.4	40% smaller	Noticeably smaller

An A5 notebook cover gives a useful sense of the overall scale, but not an exact outline. A 6×8 print is 4.4 mm wider and 6.8 mm shorter than A5. Their near-equal area does not make their frames, sleeves, or layouts interchangeable. See the A5 paper size guide.

If you are choosing between 5×7 and 6×8, the latter offers about 37% more area. A 5×7 print works well as a compact desk display; 6×8 has more presence on a shelf or small wall display. An 8×10 print is another step up for a larger portrait.

Common uses for 6×8

Wedding-album pages: in Taiwan, an eight-inch album may refer to this page size, but confirm the actual album specification.
Enlarged graduation or group photographs: faces have more room than on a 4×6 print.
Framed commemorative photos: a manageable size for a small wall display.
Pet portraits and family photographs: suitable for shelves and other home displays.

There are also practical limits:

A standard 4×6 pocket album cannot hold a 6×8 print. Buy sleeves or an album explicitly sized for the larger paper.
It exceeds Taiwan’s domestic postcard dimensions. Chunghwa Post’s maximum, checked on 30 October 2026, was 14.8 × 10.5 cm, with a 2 mm tolerance; a 20.32 cm long side is well beyond that allowance. Other postal systems have their own rules.
Immediate printing depends on the local service’s actual menu. Do not infer availability from the fact that a store offers 4×6.

For Taiwan specifically, the source’s channel comparison dated September 15, 2026 listed both 4×6 and 6×8 in the Lifephoto lifestyle-photo menu. That is a dated example rather than a promise for every branch or machine. Check locally; professional labs and online services are other possible routes.

How many pixels do you need for 6×8?

At 300 PPI, the target is 1,800 × 2,400 pixels, or 4.32 MP.

PPI	Pixels	Use
72 PPI	432 × 576	Low density for a print viewed nearby
150 PPI	900 × 1,200	May suit less demanding output or more distant viewing
300 PPI	1,800 × 2,400	Common near-view printing target
600 PPI	3,600 × 4,800	Usefulness depends on the source image and printing process

These figures describe image pixels per inch, properly called PPI. A lab may loosely request “300 DPI,” but printer dot density is a different measurement. Neither 300 PPI nor 600 PPI guarantees a particular result without considering the source and output process.

Many phone originals can meet the 4.32 MP target, but phone age or advertised sensor resolution alone is insufficient evidence. Check the actual exported file, including any crop, digital zoom, or reduced-resolution mode. A sharp, well-exposed original generally provides a better starting point than a compressed copy from a messaging service.

A 6×8 print has a 3:4 portrait ratio, matching a 4:3 landscape image when rotated appropriately. If the source has another aspect ratio, inspect the crop first and then check the remaining pixel dimensions. Use the original file where possible; messaging and social-platform copies may have reduced dimensions or compression artifacts.

For the full calculation method, see the photo pixels and print-density guide.

Choosing a 6×8 frame

A Taiwan listing described only as an eight-inch frame may be referring to 6×8, but that name is not enough to establish fit. Look for a manufacturer-stated supported photo size of 6×8 inches, or 152.4 × 203.2 mm.

Check the supported print dimensions, visible opening, and outside frame dimensions separately. The visible opening can be smaller than the paper because the frame lip or mat overlaps the edges. An 8×10 frame with a suitable mat is one option, provided its backing accommodates the print and the mat holds it securely.

Do not choose an A5 frame solely because the two formats have similar area. Their different dimensions can leave gaps or prevent the backing from closing correctly.

Frequently asked questions

What does Taiwan’s eight-inch photo mean?

It usually means a 6×8-inch print, measuring 15.24 × 20.32 cm. The Taiwan colloquial name refers to the eight-inch long side. Some print menus call this size 6R; confirm the listed dimensions.

How much larger is 6×8 than 4×6?

Its area is exactly twice as large: 48 rather than 24 square inches. Two 4×6 prints placed together along their six-inch edges form a 6×8 rectangle. At 300 PPI, the total pixel count doubles from 2.16 MP to 4.32 MP; each side does not double.

Is 6×8 the same size as A5?

No. Their areas are close, with 6×8 about 0.36%, or roughly 0.4%, smaller. But 6×8 is 152.4 × 203.2 mm and A5 is 148 × 210 mm, so their shapes and frame requirements differ.

Can convenience stores print 6×8 photos in Taiwan?

Availability depends on the machine and menu. The source’s September 15, 2026 comparison listed 4×6 and 6×8 in Lifephoto’s lifestyle-photo menu. Verify the local machine rather than assuming all convenience stores either offer or exclude 6×8.

How many centimeters is 6×8?

Exactly 15.24 × 20.32 cm, or 152.4 × 203.2 mm, using one inch = 2.54 cm.

How do I choose a frame for a 6×8 photo?

Look for explicit support for a 6×8-inch print. Check the supported photo size, backing, and visible opening separately. An 8×10 frame with a suitable mat can be an option; its window should normally overlap the photo edges. An A5 frame is not automatically compatible.

Sources for the specification checks

Dimensions and formulas checked on 30 October 2026. Prices and service examples retain the observation dates stated in the article.

This English version is based on original Traditional Chinese content on joelin.cc. The language and explanations are localised for international readers. The Traditional Chinese original is the authoritative version — for its complete meaning, please read the original article.