THE JENNA’S DAILY FIELD GUIDE

Aspect ratios are shape. Dimensions are size.

A practical guide to specifying creative sizes without leaving the designer to guess.

“Make it landscape” describes a direction, not a deliverable. A useful request names a width, height, unit, and destination. The ratio explains the shape; the dimensions specify how many pixels the file contains.

Write width × height, with units.

For a digital raster asset, 1920 × 1080 px means 1,920 pixels across and 1,080 pixels down. It has the same shape as 1280 × 720 px, but it contains more pixels. Neither size is a universal requirement for a platform or placement.

Example dimensionsSimplified ratioWhat it tells you
1200 × 1200 px1:1Equal width and height; square.
1920 × 1080 px16:9Landscape; width is greater than height.
1080 × 1920 px9:16Portrait; height is greater than width.
1200 × 628 px300:157A specific shape; do not round to a different ratio.

The calculation is exact.

To simplify a ratio, divide width and height by their greatest common divisor. For 1920 and 1080 that divisor is 120, giving 16:9. The builder accepts positive whole-pixel values and preserves unusual ratios rather than forcing them into a preset.

Resizing and cropping solve different problems.

Resizing proportionally keeps the original ratio. Turning a 16:9 composition into a 1:1 square requires a different treatment: crop part of the frame, add space, or redesign the layout. Stretching the original distorts its contents. Tell your collaborator which treatment is allowed.

Give every destination its own line.

A website hero and an email header may both be landscape but require different dimensions, crops, and file weights. Add separate deliverables when the specifications differ. Name them clearly enough that the exported files can be matched back to the brief.

The dimensions in this guide are arithmetic examples, not current specifications for any advertising or social platform. Check the receiving system before production.

For print, pixels alone are incomplete.

A print handoff also needs physical dimensions, bleed, and the printer’s resolution and color requirements. At a specified resolution, pixels equal inches multiplied by pixels per inch. This builder does not validate print production settings; include them in the notes and confirm them with the printer.

MAKE THE NEXT HANDOFF EASIER

Keep the details in focus.