A device for contactless measuring of at least one, preferably at least two metal strands (6, 6', 6"), moving along a production direction of a continuous casting plant through an outlet area of the continuous casting plant, in particular in the billet or bloom format, - the device comprising at least one, preferably at least two projection devices (4, 4'), at least one, preferably at least two sensors (2, 2'), and an evaluation unit, - wherein the projection device (4, 4') is configured to project at least one, preferably at least two light patterns (3, 3', 3", 3′′′) on the metal strand (6, 6', 6"), - wherein the sensor (2, 2') is arrangeable at a height (h) above the outlet area and is configured to generate a time sequence (20, 20', 20") of two-dimensional images and transmit it to the evaluation unit, - wherein the sensor (2, 2') is configured to acquire a surface area (7, 7', 7", 7′′′) of the metal strand (6, 6', 6"), having the light pattern (3, 3', 3", 3′′′) projected thereon, extending along a longitudinal direction (X S, X S ', X S ") of the metal strand (6, 6', 6") and in a plane normal to the longitudinal direction (X S, X S ', X S "), - wherein the evaluation unit is configured to detect the surface area (7, 7', 7", 7′′′) and the light pattern (3, 3', 3", 3′′′) projected thereon in the single images of the sequence (20, 20', 20"), - wherein the evaluation unit is configured, from the spatial arrangement of the projection device (4, 4') and the sensor (2, 2') relative to the outlet area and from the surface area (7, 7', 7", 7′′′) and the light pattern (3, 3', 3", 3′′′) projected thereon, to determine the geometric dimensions of the metal strand (6, 6', 6") at a large number of positions along the longitudinal direction (X S, X S ', X S ") of the metal strand (6, 6', 6") in the production direction, - wherein the evaluation unit is configured to identify individual textures on the metal strand (6, 6', 6") in two or more images of the sequence (20, 20', 20"), determine the relative image position in the two or more successive images, and, therefrom and from an image frequency and an imaging scale of the relevant sensor (2, 2'), to determine a velocity (V S, V S ', V S ") of the metal strand (6, 6', 6") relative to the sensor (2, 2') in the production direction on the basis of a correlative optical measuring method, and - wherein the projection device (4, 4') is arrangeable at a horizontal distance (d) to the sensor (2, 2'). - the device comprising at least one, preferably at least two projection devices (4, 4'), at least one, preferably at least two sensors (2, 2'), and an evaluation unit, - wherein the projection device (4, 4') is configured to project at least one, preferably at least two light patterns (3, 3', 3", 3′′′) on the metal strand (6, 6', 6"), - wherein the sensor (2, 2') is arrangeable at a height (h) above the outlet area and is configured to generate a time sequence (20, 20', 20") of two-dimensional images and transmit it to the evaluation unit, - wherein the sensor (2, 2') is configured to acquire a surface area (7, 7', 7", 7′′′) of the metal strand (6, 6', 6"), having the light pattern (3, 3', 3", 3′′′) projected thereon, extending along a longitudinal direction (X S, X S ', X S ") of the metal strand (6, 6', 6") and in a plane normal to the longitudinal direction (X S, X S ', X S "), - wherein the evaluation unit is configured to detect the surface area (7, 7', 7", 7′′′) and the light pattern (3, 3', 3", 3′′′) projected thereon in the single images of the sequence (20, 20', 20"), - wherein the evaluation unit is configured, from the spatial arrangement of the projection device (4, 4') and the sensor (2, 2') relative to the outlet area and from the surface area (7, 7', 7", 7′′′) and the light pattern (3, 3', 3", 3′′′) projected thereon, to determine the geometric dimensions of the metal strand (6, 6', 6") at a large number of positions along the longitudinal direction (X S, X S ', X S ") of the metal strand (6, 6', 6") in the production direction, - wherein the evaluation unit is configured to identify individual textures on the metal strand (6, 6', 6") in two or more images of the sequence (20, 20', 20"), determine the relative image position in the two or more successive images, and, therefrom and from an image frequency and an imaging scale of the relevant sensor (2, 2'), to determine a velocity (V S, V S ', V S ") of the metal strand (6, 6', 6") relative to the sensor (2, 2') in the production direction on the basis of a correlative optical measuring method, and - wherein the projection device (4, 4') is arrangeable at a horizontal distance (d) to the sensor (2, 2').