Resizing a web element using movebyoffset

public void resize(WebElement elementToResize, int xOffset, int yOffset) {
        try {
        if (elementToResize.isDisplayed()) {
        Actions action = new Actions(driver);
        action.clickAndHold(elementToResize).moveByOffset(xOffset, yOffset).release().build().perform();
        } else {
        System.out.println("Element was not displayed to drag");
        }
        } catch (StaleElementReferenceException e) {
        System.out.println("Element with " + elementToResize + "is not attached to the page document "  + e.getStackTrace());
        } catch (NoSuchElementException e) {
        System.out.println("Element " + elementToResize + " was not found in DOM " + e.getStackTrace());
        } catch (Exception e) {
        System.out.println("Unable to resize" + elementToResize + " - " + e.getStackTrace());
        }
        }

(OR)

moveToElement(WebElement toElement, int xOffset, int yOffset)
Moves the mouse to an offset from the top-left corner of the element.

 

Actions builder = new Actions(driver);   
builder.moveToElement(knownElement, 10, 25).click().build().perform();