In fact, the correct term is width. Depth is for something like a swimming pool.

4a9d1fac · Raul Garcia-Castro · 9d686d24 · 4a9d1fac
Commit 4a9d1fac authored 5 years ago by Raul Garcia-Castro
--- a/ontology/saref4wear.ttl
+++ b/ontology/saref4wear.ttl
@@ -362,8 +362,8 @@ s4wear:hasDataTransmissionRate rdf:type owl:DatatypeProperty ;
                               rdfs:range xsd:double .


-###  https://saref.etsi.org/saref4wear/hasDepth
-s4wear:hasDepth rdf:type owl:DatatypeProperty ;
+###  https://saref.etsi.org/saref4wear/hasWidth
+s4wear:hasWidth rdf:type owl:DatatypeProperty ;
                rdfs:domain s4wear:Wearable ;
                rdfs:range xsd:double .