Catalogs
A dimension filter needs a unit and a clear meaning
A field labeled size may be understandable to experienced staff and ambiguous to everyone else. Catalog filters should describe the characteristic the buyer is choosing, including its unit and the meaning of the selection.
Use a small product sample
A Czech specialist catalog might contain several dimensions, ranges and product variants. Choose a representative sample before designing filters. Ask which characteristics actually distinguish suitable items for the buyer's first decision.
Separate the types of choice
| Filter type | What needs explanation |
|---|---|
| Exact value | The measured characteristic and unit. |
| Range | Whether endpoints are included and how unknown values behave. |
| Category | The meaning of the available named options. |
Show the active choice
A buyer should be able to see and clear filters, understand an empty result and return without losing useful context. Do not infer a technical recommendation solely from a match in the catalog.
Test the awkward record
Include an item with a missing value and one at the edge of a range. Ask the product owner to confirm the result. The business approves specifications and professional suitability; the website implements those reviewed distinctions.
W3C's form-grouping guidance can help present related controls. A catalog project should include the data model and empty states along with the visual filter design.