Regulation (EU) No 1007/2011 sets out rules on the labelling or marking of textile products, including textile products containing non-textile parts of animal origin and rules on the determination of the fibre composition of textile products by quantitative analysis of binary and ternary textile fibre mixtures. Experience showed that analysis of several categories of textile products, made in laboratories, delivers different results, even though the laboratories use the same analytical methods. The Technical Guidelines for EU Textile Laboratories aims to describe the rules and procedures to facilitate the analysis and quantification of the fibre composition of 12 products. The products analysed for the purposes of these Guidelines were finished textile products belonging to the following categories indicated in Regulation (EU) No 1007/2011: a) ANNEX IV, b) ANNEX VII, c) Article 9 (multi-fibre textile products) in relation to Article 7 (pure textile products), d) Article 10 (products with decorative fibres and fibres with anti-static effect), e) Article 11 (multi-component textile products) and f) products made of coated fabrics with specific characteristics or functionalities. A network of twelve textile laboratories accredited by a market surveillance authority into EU and EEA EFTA Member States in line with Regulation (EC) 765/2008 was set up. The products selected to be analysed are those that potentially could be the cause of more discrepancies in the analysis. The selection procedure of the products was as follows: AITEX created a document with five possible products per category. Each participating laboratory evaluated the proposed products in terms of representativeness, demand for testing and degree of difficulty. The following 12 products were chosen: embroidered shirts, sport socks, leggings, tights, jackets, brassières, towels, gloves, tablecloths, carpets and fabrics with antistatic effect. To this end, an inter-laboratory statistical exercise (Round Robin) was carried out to validate the Technical Guidelines for EU Textile Laboratories. It has been detected that the discrepancies in the results obtained from the implementation of the different protocols come from the different interpretations of the product definitions and the sampling performed. The results obtained indicate that the development of specific protocols for selected products minimise deviations and discrepancies in the analysis results. Furthermore, Regulation (EC) No 1007/2011 must be followed thoroughly.