size carousel bootstrap 4
.carousel .item {
height: 300px;
}
.item img {
position: absolute;
top: 0;
left: 0;
min-height: 300px;
}
Source: stackoverflow.com
.carousel .item {
height: 300px;
}
.item img {
position: absolute;
top: 0;
left: 0;
min-height: 300px;
}