OceanWP has controls for max logo height and max logo width in the Customizer under Customizing/Header/Logo
but it has no settings for min logo height or min logo width. OceanWP seems to calculate it’s own calculated settings. Sometimes those settings are too small. To override it use this example bit of css for that below.
#site-logo #site-logo-inner a img, #site-header.center-header #site-navigation-wrap .middle-site-logo a img {min-width:280px}
