Images Exporting As Thumbnail Sizes

My code

<!-- Start Slider -->
<?php
            // Get Data From Meta
            $images = rwmb_meta( 'cam_slider_images', 'type=image_advanced' );
            // Blank Variable To Append Too
            $slider_image_output = "";
            // Append Meta Value To Variable
    foreach ( $images as $image )
    {
        $slider_image_output.= '[slide][image src="'.$image['url'].'" alt="'.$image['alt'].'"][/slide]';
    }
    // Echo The Shortcode With WordPress :)
    echo (do_shortcode('[slider animation="fade, slide" slide_time="4000" slide_speed="500" slideshow="true" random="true" control_nav="false" prev_next_nav="true" no_container="true"]'. $slider_image_output . '[/slider]'));
?>
<!-- End Slider -->

My image src’s keep being exported as 150×150 i want them either full size or at least 700px long how can i do this?

https://wordpress.org/plugins/meta-box/