DEVOPS3 Pack Men's Cool Dry Short Sleeve Compression Shirts, Sports Baselayer T-Shirts Tops, Athletic Workout Shirt

Do these stay tight around the neck without stretching? I wear a uniform and looking for tight fitting shirts that won’t stretch when being tucked in.

Anyone order the white? Is it like the picture you get two with white seams and one with grey seams?

My husband wears an xlarge shirt. Should i order an xlarge in this as well?

can i have a size chart?