score:5
No, Jehovah's Witnesses don't have any special garments, nor is there a clergy class.
They do try to dress up for their ministry and Kingdom Hall meetings, according to the principle at 1 Timothy 2:9, 10. Different cultures will have different expectations for what constitutes "appropriate" and "modest" dress and grooming, so there are no specific rules.
9 Likewise, the women should adorn themselves in appropriate dress, with modesty and soundness of mind, not with styles of hair braiding and gold or pearls or very expensive clothing, 10 but in the way that is proper for women professing devotion to God, namely, through good works.
You can observe what JWs look like around the world in the side-scrolling images on jw.org.
In terms of symbolic objects, Jehovah's Witnesses use unleavened bread and red wine as symbols during the Memorial of Jesus' Death once each year.
Upvote:4
No, they have no need for special robes or vestments, and neither do they have any sacred or symbolic objects that are used in worship. They do not have ordained ministers or any sort of clergy class and would be likened to "lay preachers" who volunteer to preach and to teach.
Men and women dress modestly and when they go from door to door, they look like ordinary, everyday people with the men in suits and the women in skirts or dresses.
If you went into a Kingdom Hall to attend their meetings, you would not see any stained glass windows, crosses, images of Jesus or Mary or the Apostles, and no altar adorned with gold or brass candelabra or chalices.