IRCT2016041516123N7 IRCT 2016-04-24 Ahvaz Jundishapur University of Medical Sciences Evaluation of the effect of eating utensils sizes on food intake during a meal in obese or overweight patients Comparison of food intake in Large and small dishware in obese or overweight patients 2016-04-20 anticipated 50 Complete https://irct.ir/trial/15185 interventional Randomization: N/A, Blinding: Not blinded, Placebo: Not used, Assignment: Crossover, Purpose: Other. N/A Obesity. Intervention 1: Intervention group: patients will receive small size eating utensil including small size ceramic dining plate (19.5 Cm), small spoon (5 ml), small fork and a 120 ml glass. Each patient in the intervention group will receive a lunch package consisted of 270 grams of barbecued chicken breast (seasoned with onion, saffron and lime juice), 600 grams of steamed rice and two medium size tomatoes as optional side dish, 430 grams of vegetable salad with 42 grams mayonnaise which will be served separately. Intervention 2: Control group: patients will receive large size eating utensil including large size ceramic dining plate (25 Cm), large spoon (15 ml), large fork and a 120 ml glass. Each patient in control group will receive a lunch package consisted of 270 grams of barbecued chicken breast (seasoned with onion, saffron and lime juice), 600 grams of steamed rice and two medium size tomatoes as optional side dish, 430 grams of vegetable salad with 42 grams mayonnaise which will be served separately.