Side to side
Measure the usable internal span where the backdrop or piece will actually sit.
Measurement guide
How to measure a reptile enclosure before ordering a custom backdrop.
A practical guide to measuring a reptile enclosure for a custom backdrop: internal usable width, height, depth, tracks, vents, silicone, braces, lighting and other obstructions.
Core dimensions
Measure internal usable width, height and depth.
Use a rigid tape measure where possible and take each dimension at more than one point if the enclosure may not be perfectly square. Record whether your numbers are internal or external.
Do not guess hidden clearances
If you are unsure how much clearance a track or silicone bead needs, photograph it and leave the uncertainty visible in the enquiry. It is safer to confirm than to invent a precise number.
Base to top obstruction
Include rails, braces or lighting positions that reduce the available height.
Front-to-back context
Useful for ledges, returns, side panels and understanding access.
Photographs
A measurement without context can still miss the problem.
Take one full enclosure photo and close-ups of doors, tracks, vents, silicone joins, braces, cables, probes and any equipment or fixed feature near the intended work.
Customer installation
If the backdrop will be shipped or collected for you to install yourself, mention door opening sizes and any restrictions on getting a finished piece into position.
Show the whole enclosure
This helps us understand where each measurement belongs.
Show obstructions
Tracks and fixed features can matter more than a few millimetres on the advertised size.
Say what you do not know
A note saying “not sure if this is usable width” is better than a confident but wrong figure.
Common questions
Useful answers before you enquire.
Custom work starts with context. If you are unsure about a measurement or detail, leave it uncertain rather than guessing and we can tell you what matters.
Should I measure inside or outside the enclosure?
For fitted backdrop work, internal usable measurements are normally more useful. External size can still be included as supporting information.
What if the enclosure is not perfectly square?
Take the measurement in more than one location and mention the variation. Photos can help show whether it is likely to affect fit.
Do I need to measure silicone and tracks?
Photograph them and provide their approximate intrusion where practical. The important point is not to pretend the full glass-to-glass span is usable if tracks or silicone occupy that space.