SightSize Studio – Artist Photo Measurement & Proportions Tool
A precision web application built for classical ateliers, portrait painters, figurative artists, and digital illustrators to measure proportions and check alignments on reference photos.
Core Capabilities & Art Tools
- Point-to-Point Caliper: Click any two points on a photograph to measure exact pixel lengths and sighting angles.
- Base Scale Proportions: Designate any measurement as the primary unit (1.000x Base). All other landmarks display as proportional fractions (e.g. 0.50x, 0.25x, 1.62x).
- Paper Scale Calibration (cm & in): Define the physical size of your base unit on your drawing paper in centimeters or inches to read out exact paper measurements.
- Sighting Angles & Plumb Lines: True vertical (V°) plumb line and horizontal (H°) level line angle calculations for every measurement line.
- Touchpad Navigation: Smooth two-finger canvas gliding and pinch-to-zoom for seamless laptop drawing workflow.
- Sight-Size Grid Overlays: Customizable square grids, Rule of Thirds, and Golden Ratio divisions.
- Values Study: Instant monochrome black & white conversion and high-contrast tuning to inspect tone and shadow shapes.
Frequently Asked Questions
How does comparative measurement work?
Instead of measuring in fixed inches or centimeters on the model, artists choose a key unit—such as eye width or head height—and calculate every feature as a ratio of that unit.
How do I use this tool with drawing paper?
Measure your base feature on the photo, enter the target size you want to draw it on your paper (for example 16cm), and SightSize Studio will automatically calculate the exact paper size for every other feature you measure.