Labels to print out for Ruslan 1 Lesson 1 Speaking exercise 3 (page 24 in the UK edition)
These are pdf files that print out onto A4 size sheets of blank labels, 16 labels per sheet. Instructions for the exercise are on page 24 of the Ruslan 1 book. For a group of up to 20 students I would suggest that you use just 3 or 4 of the professions. Cut up the sheets and give each student a label. Tell them not to show their labels to each other. Then ask them to find the other people with the same profession, as in the exercise in the book. Once they have found all the other people, then they can put on the labels, and you can then use them for further speaking practice.