Hello there,

You should add some CSS code to your Appearance > Customize > Additional CSS. The code below will produce buttons similar to the ones you mentioned. However, you may want to adjust padding/margins to make it look even better.

.page-links a {
background: #ff972d;
color: #fff;
font-family: “Stafford Regular”, “stafford-serialregular”, “Stag Web”, “Times New Roman”, Times, serif;
font-size: 32px;
font-weight: bold;
letter-spacing: 2px;
padding: 20px;
text-align: center;
width: 100%;
float: left;
text-transform: uppercase;
text-decoration: none;

I hope the above is useful to you.