@NonNull
    public static CacheSize getByGcId(final int gcId) {
        final CacheSize result = FIND_BY_GC_ID.get(gcId);
        return result == null ? CacheSize.UNKNOWN : result;
    }
lookup for OC JSON requests (the numeric size is deprecated for OC)
main/src/main/java/cgeo/geocaching/enumerations/CacheSize.java