Hey there,
I got this from BWF
22. LETTERING ON PLAYERS’ CLOTHING
22.1 In all sanctioned tournaments, including those organised by the BWF itself, and Multi-sport
games, each article of clothing may only have visible lettering as provided in Regulations 22.2 to
22.5.
22.2 Colour, style and height of lettering
22.2.1 Lettering shall be in capital letters in the Roman alphabet (except as in Regulation
22.5.2), and in one single colour contrasting with that of the shirt.
22.2.2 If there is a pattern on the back of the shirt, the lettering should be on a contrasting panel.
22.2.3 In order that the player’s name be legible from a distance for spectators in the stadium
and television viewers, lettering must be a minimum height of 6 centimetres and a
maximum height of 10 centimetres.
22.2.4 The country name must be a height of 5 centimetres.
22.2.5 Lettering should be horizontal, or as close to horizontal as practically possible, and
placed near the top of the shirt.
23. ADVERTISING ON PLAYERS’ CLOTHING
23.1 In all sanctioned tournaments, including those organised by the BWF itself and Multi-sport
games, articles of clothing may only have advertising as provided in Regulations 23.2 to 23.5.
23.2 The shirt may carry advertising as in Regulations 23.2.1 to 23.2.2.
23.2.1 A maximum of one advertisement may appear on each of the following locations; left
sleeve, right sleeve, left shoulder, right shoulder, left collar, right collar, right chest, left
chest and centre chest. The shoulder is defined as the visible part of the shoulder on the
front of the shirt. There must be no more than five advertisements in total and National
flags or emblems for the purpose of this regulation count as advertisements. Each
advertisement, including National flags or emblems, must be 20 square centimetres or
less.
23.2.2 Advertising contained in a band of uniform width not exceeding 10 centimetres on the
front and not exceeding five centimetres on the backs. Such a band may be at any angle
and may be on the front of the shirt, the back of the shirt, or both.
23.2.3 If, in the Referee’s sole judgment, there is a clash between the content of the advertising
in Regulation 23.2.2 and the tournament sponsors or the TV broadcasters, or if the
content of the advertising would infringe local laws or be considered offensive, then the
Referee may limit advertising on the shirt to Regulation 23.2.1.
23.3 Other Clothing
23.3.1 Each sock may carry two advertisements of 20 square centimetres or less.
23.3.2 Advertising on shoes is accepted subject to the make and model of shoe being available
in the open market for at least three months prior to the tournament in which they are
being worn.
23.3.3 Each other article of clothing may carry one advertisement of 20 square centimetres or
less.
23.3.4 Clothing worn under player shirts, shorts, skirts or dresses, shall be known as
‘underclothing’ and not categorised as ‘articles of clothing’, and if visible must not
display advertising.
23.4 Restrictions on the advertising
23.4.1 The advertisements in Regulations 23.2 and 23.3 may be the clothing manufacturer’s
emblem or that of any sponsor.
23.4.2 Each advertisement shall only be of one organisation or product.
23.4.3 The advertisements shall follow the International Olympic Committee principles and
shall not contain any political, religious messages or anything which is not a commercial
brand, registered mark or trade mark. (e.g. I don’t have a sponsor, I am nice, etc.).
23.4.4 Players displaying tattoos, paints, transfers or similar (which are not on clothing) may
not display any tattoo, paint or transfer which is illegal, defamatory or commercial in
nature or otherwise in breach of the principles relating to advertising on clothing outlined
in 23.4.3
23.5 In multi-sports games (e.g. Olympic Games) the organisers may specify more restrictive
advertising limitations on players’ clothing during play than in Regulations 23.2 to 23.4.