Table 2.

Characteristics of participating establishments

	Previous studies			Current studies
	Bar and restaurant	Bar 1a	Bar 2	Restaurant A		Bar A	Bar B
	Pechey et al. [8]	Pechey et al. [9]		Study 1	Study 2	Study 3	Study 4
Standard glass size (ml)	300	350	350	310b	350c	350	350
Intervention glass sizes (ml)	250, 300, 370	300, 370, 510	300, 510	290, 350, 450	290, 350, 450	290, 350, 450	290, 350, 450
Price of 175 ml of wine (£)	5.00	4.10	5.40	5.90	5.90	5.21	4.34
Serving sizes offered (ml)
Fixed	125, 175	125, 175, 250	125, 175, 250	125, 175	125, 175	125, 175, 250	125, 175, 250
Free-poured	500, 750, 1000	750	750	500, 750, 1000	500, 750, 1000	750	750
Sales by-the-glass (%)	Bar: 93 Restaurant: 63	88	88	66	67	90	91
Study period	March–July 2015	March–July 2016	March–July 2016	July–November 2017	April–October 2018	May–September 2018	May–September 2018

^aBar 1 in the previous studies is the same establishment as Bar A in the current studies

^bIn Study 1, wine glasses in current use in establishments were replaced in order to compare sales of wine when using 350 ml glasses to sales when using 450 ml and 290 ml glasses

^cFollowing Study 1, this establishment updated their standard glass size from 310 ml to 350 ml Royal Leerdam Bouquet glasses