.leaflet-magnifying-glass {
  border-radius: 50%;
  border: 1px solid gray;
  box-shadow: 0 0 5px gray;
  position: absolute;
  overflow: hidden;
}

.leaflet-magnifying-glass > .leaflet-container {
  height: 100%;
  width: 100%;
}

/* Webkit-only workaround for the border-radius clipping bug,
applied to the map container */
.leaflet-magnifying-glass-webkit {
  border-radius: 50%;
  -webkit-mask-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAA5JREFUeNpiYGBgAAgwAAAEAAGbA+oJAAAAAElFTkSuQmCC);
}
.leaflet-magnifying-glass {
  border-radius: 50%;
  border: 1px solid gray;
  box-shadow: 0 0 5px gray;
  position: absolute;
  overflow: hidden;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

.leaflet-magnifying-glass > .leaflet-container {
  height: 	100%;
  width: 	100%;
}

/* Webkit-only workaround for the border-radius clipping bug,
applied to the map container */
.leaflet-magnifying-glass-webkit {
  border-radius: 50%;
  -webkit-mask-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAA5JREFUeNpiYGBgAAgwAAAEAAGbA+oJAAAAAElFTkSuQmCC);
}
Use box-sizing model to avoid wrong offset
Use box-sizing model to avoid wrong offset
